InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51901. |
The reaction of with sodium hydroxide is called |
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Answer» hydroxide reacts with aluminium and water to RELEASE hydrogen gas. The aluminium takes the OXYGEN atom from SODIUM hydroxide, which in TURN takes the oxygen atom from the water, and releases the two hydrogen atoms, The reaction THUS produces hydrogen gas and sodium aluminate.#нσρє íт нєℓρѕ♡~#мαяк αѕ вяαíηℓíѕт☘️ |
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| 51902. |
- Co-ordinate covalent bond is always formed between the two: (*) Like atom (*) Unlike atom (*) Similar atom (*) Like and unlike atoms |
| Answer» LIKE and UNLIKE atomsExplanation:like and unlike ATOMS | |
| 51903. |
how will you test the presence of base in any substance by using chine rose petals and phenolphthalein? |
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Answer» c paper turns into red when it is dipped into BASIC SOLUTION. TURMERIC paper does not CHANGE its colour with acid. CHINA Rose: China rose is another natural indicator. China rosesolution gives dark pink (magenta) colour with acid and green colour with base |
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| 51905. |
Vah todti Patthar Kavita ki Man Se Vedna Apne shabdon Mein likhiye |
| Answer» MERE shabdon MEIN tog main Kuch Nahi LIKH Sakta other than this. | |
| 51906. |
Iron metal + Copper(II) sulphate → Iron(ii) sulphate + copper metal |
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Answer» Fe+CuSo4 = FeSo4+CuExplanation:this is RIGHT |
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| 51907. |
Explain the 4 types of structural isomerism in organic compounds |
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Answer» tion: There are three TYPES of Structural isomerism existing namely chain isomerism, POSITION isomerism and functional group isomerism. ... If two or more compounds having the same type of molecular FORMULA with different main chains, then they are SAID to exhibit the property of Chain isomerism. |
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| 51908. |
Moderator ! Genius ! Most of the mass of an atom is contained in ________.(A) Protons (B) Electron (C) Center (D) NeutronsAnd give reason for your answer. WARNING :- DO NOT SPAM !!! |
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Answer» s |
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| 51909. |
Explain the structural isomerism in organic compounds |
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Answer» What is structural isomerism? ISOMERS are molecules that have the same molecular FORMULA, but have a different arrangement of the atoms in space. That excludes any different arrangements which are SIMPLY due to the molecule rotating as a whole, or rotating about particular bonds. |
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| 51910. |
When we are sleeping then we are why saying goodnight |
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Answer» we say so that when we SLEEP, we sleep peacefully and have sweet DREAMS so that we have a REFRESHING START the next day. when we wish someone that way it shows CARE nd brings positivity.Explanation:pls mark me the brainliest and give me stars according to how u like the answer |
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| 51911. |
How will you convert prop-1-ene to 1bromopopene |
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Answer» dongsucjehsysisbxhsudjxb |
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| 51912. |
Write the prosidure to make the simple ecectroscope |
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Answer» Procedure:Perform this experiment on a dry day! The experiment might not work if it is humid or raining. Why do you think this is important?Use the scissors to cut a TWO-INCH long piece of straw.Have an adult punch a hole through the center of the jar lid or piece of plastic big enough to fit the straw through.Insert the straw into the hole for your lid. Hot glue the straw so it is securely fastened to the lid.Cut a 10-inch piece of copper wire.Twist the top 4 inches into a CIRCLE or spiral to create some surface area. If we’re trying to test the presence of an electric charge, why do you think having a larger surface area better? Why is thicker wire better?Insert the straight end of the wire through the straw and create a hook about 1 inch long.Hang two small pieces of foil or gold leaf on the hook. Make sure they are in contact. Why do you think we’re using two pieces of metal as opposed to one? What do you think the two pieces of metal are there to do?Place the hooked end of the metal into the jar and twist on or tape the lid to the jar.Now it’s time to give our materials a STATIC charge! RUB each of your materials vigorously with your hand or a piece of wool. Can you explain how this helps give each object an electric charge?After you give each of your objects a charge, bring each object near the coiled wire on your electroscope. Be sure to record your observations! |
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| 51913. |
The properties of a substance depend on _______________ |
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Answer» Here is your ANSWER EXPLANATION:HOPE it's HELP you |
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| 51915. |
Exercises LOa.e lightA. Tick the most appropriate answer.1. Which of the following is not considered as matter?airb. waterC. sun2. The intermolecular force of attraction is maximum inb. liquids.C. gases.3. Fluidity is maximum inb. liquids.C. gases.a. solids.d. both a and ca. solids.d. all of these4. Gasesa. cannot be compressed easily.b. occupy the entire space in the container.chave a definite shape.d. cannot flow.5. Which of the following have only one free surface?b. liquidsC. gasesd. all of thesea. solidsGill in the blanks |
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Answer» 1. sun2.solids// liquids3.liquids and gases4.gases OCCUPY the entire SPACE in the container.chave a definite shape.5. { i don't KNOW BRO } |
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| 51916. |
06. The standard potential of electrode , Zn²+ (0.02M)| Zn (s) is -0.76 V. Calculate it's potential |
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Answer» tion:hlo mate here's your answer For the given cell,Ecell=E cello20.0591log [ C U 2+ ][ Z N 2+ ](i)E 1E cello20.0591log 0.11=E cello20.0591(ii)E 2E cello20.0591log 11=E cello20.0591×0=E cello(III)E 3E cello20.0591log 10.1=E cello20.0591∴E 3E 2Ei hope its help you MARK as BRAINLIST plz ok |
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| 51917. |
કાર્બન ડાયૉક્સાઈડમાાં કાર્બનન ાં દળથી ટકાવાર પ્રમાણ કેટલ ાં છે? |
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| 51918. |
How many ex offico members in ptc |
| Answer» COMPOSITION of PTC: At least three physicians A pharmacist A representative of the nursing staff A hospital ADMINISTRATOR or his/her DESIGNATED person and ex-officio member of the committee The physician may be appointed as the “ CHAIRMAN ” of P.T.C.Explanation:hope it helps you make me a BRAINLIEST | |
| 51919. |
Metals are elements (a) Which can lose electron easily forming +ve ions (b) Which can gain electron easily forming -ve ions (c) Both of these (d) Breakable |
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Answer» The CORRECT ANSWER is option A-lose their electrons to FORM positive IONS |
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| 51920. |
Derive the equation for work maximum |
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Answer» The total work is obtained by integration of EQUATION (3) between the LIMITS of initial and final states. This is the maximum work, the expansion being reversible. = - nRT V V dV V nRT ∫ V 1 V 2 dV V ... (∵ T is CONSTANT.)Explanation: |
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| 51921. |
Ozone layer is depending by |
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Answer» In the STRATOSPHERE, ozone is created PRIMARILY by ultraviolet radiation. When high-energy ultraviolet rays strike ordinary oxygen molecules (O2), they split the molecule into two single oxygen atoms, known as ATOMIC oxygen. A FREED oxygen atom then combines with ANOTHER oxygen molecule to form a molecule of ozone |
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| 51922. |
Detection of two basic radicals from the mixture Al3+, NH4+ |
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Answer» tion:DETECTION of TWO BASIC RADICALS from the mixture Al3+, NH4+detection of two basic radicals from the mixture Al3+, NH4+detection of two basic radicals from the mixture Al3+, NH4+ |
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| 51923. |
10. Write balance chemical equation for reaction between H2O2 and MnO4 in acidic and basic medium. |
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Answer» The unbalanced redox equation is as follows:H2O2+MnO4−⟶O2+MnO2(basic)All atoms other than H and O are balanced.The oxidation number of MN changes from +7 to +4. The change in the oxidation number is 3.The oxidation number of O changes from -1 to 0. The change in the oxidation number per O atom is 1. The total change in oxidation number for 2 O atoms is 2.To balance the increase in the oxidation number with decrease in the oxidation number multiply MnO4− and MnO2 with 2 and multiply H2O2 and O2 with 3..3H2O2+2MnO4−⟶3O2+2MnO2(basic)To balance O atoms, add four WATER molecules on RHS.3H2O2+2MnO4−⟶3O2+2MnO2+4H2O(basic)To balance H atoms, add 2H+ on LHS.3H2O2+2MnO4−+2H+⟶3O2 |
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| 51924. |
Write scientific reasons of Sodium is a compound? |
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Answer» Explanation:Sodium (Na), chemical element of the ALKALI metal group (Group 1 [Ia]) of the periodic table. Sodium is a very soft silvery-white metal. Sodium is the most common alkali metal and the sixth most abundant element on Earth, comprising 2.8 percent of Earth’s crust. It occurs abundantly in NATURE in compounds, especially common salt—sodium chloride (NaCl)—which forms the mineral halite and CONSTITUTES about 80 percent of the dissolved constituents of SEAWATER. |
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| 51925. |
1 lit of 1 M copper sulphate solution is electrolysed by passing 1.5 faradays charge .Find molarity of solution --------- * |
| Answer» NCH of science concerned with the substances of which MATTER is COMPOSED, the INVESTIGATION of their properties and reactions, and the use of such reactions to form new substances. | |
| 51926. |
It is impossible to liquefy CO2 gas at 50 degree Celsius give reason |
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Answer» it is IMPOSSIBLE to liquefy CO2 gas at 50 DEGREE Celsius give reasonExplanation:it is impossible to liquefy CO2 gas at 50 degree Celsius give REASON |
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| 51927. |
C(s) +o2 (g) =co2(g) balance the equation |
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Answer» d EQUATION:-Its BALANCED alreadyReactant SIDE:-Carbon=1 atomsOxygen=2atomsProducts side:-Carbon=1atomOxygen=2atomdHence VERIFIED. |
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| 51928. |
In secont excited state of cl find the maximum sum of n+l+m for unpaired electrons |
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Answer» 4Explanation:The MAXIMUM VALUE of (N+l+m) for all the unpaired electrons of CHLORINE in its second excited state .ELECTRONIC configuration of chlorine atom1s22s22p63s23p5First exited state chlorine atom1s22s22p63s13p6Second exited state chlorine atom1s22s22p63s03p64s1For only one unpaired electron present present in 4s orbitalValue of n =4Value of l =0Value of m =0Therefore , the maximum value of (n+l+m) for all the unpaired electrons if chlorine in its second excited state .=4+0+0=4 |
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| 51929. |
Explain the application of uv-visible spectroscopy in a) detection geometrical isomers b) determination of- strength of - hydrogen bond |
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Answer» nch of SCIENCE CONCERNED with the SUBSTANCES of which matter is composed, the investigation of their properties and reactions, and the USE of such reactions to FORM new substances. |
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| 51931. |
You can easily move your hand through water but in order to move it through a wooden block, you have to be a karate expert. |
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Answer» We can easily move our hand in the AIR but to do the same through a solid block of WOOD we need a KARATE expert because, in air, there is a less force of ATTRACTION between the particles. So, very less amount of external force can BREAK it. ... Hence a large amount of force is required to break it. |
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| 51932. |
First element ever found? |
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Answer» rst' CHEMICAL elementThe 'first' chemical elementPhosphorous (P) was the first chemical element to be discovered after the ancient times by GERMAN ALCHEMIST Hennig Brand in 1669. At the time, Brand was trying to create the philosopher's STONE, a legendary alchemical substance that was thought to turn METAL into gold. |
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| 51933. |
What is effect of heat on orthoboric acid? |
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Answer» When further HEATED on a COMPARATIVELY higher temperature, the metaboric acid forms loses water further and RESULTS into the formation of tetra boric acid. When tetra boric acid is SUBJECTED to red heat, it further UNDERGOES loss of water to result in the formation of boron trioxide or borax. |
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| 51934. |
अनादर्श विलयन के दो उदाहरण |
| Answer» TION:उदाहरण : एथेनॉल तथा एसीटोन का विलयन। वह विलयन जिसके लिए वाष्प दाब का मान , राउल्ट द्वारा निर्धारित वाष्प दाब से कम होता है तो ऐसे विलयन को ऋणात्मक विचलन प्रदर्शित करने वाले अनादर्श विलयन कहते है। | |
| 51935. |
Is Lucas reagent used in Groove's Process?? |
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Answer» ed Answer✯Lucas test in ALCOHOLS is the test to distinguish between among PRIMARY, secondary and tertiary alcohols. ... While GROVES PROCESS is the process of synthesizing alkyl halides from alcohols by MAKING use of zinc chloride.꧁♥️queen♥️꧂ |
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| 51936. |
Gringards reagent is |
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Answer» A Grignard reagent is an organomagnesium halide having a formula of RMgX, where X is a HALOGEN (-Cl, -Br, or -I), and R is an alkyl or ARYL (based on a benzene ring) group. To initiate a Grignard Reaction, a Grignard reagent is added to a ketone or ALDEHYDE, to form a tertiary or secondary alcoholmark as brainliest if it HELPS you |
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| 51937. |
Ch3-ch- ch=ch+H2O----- | ch3 |
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Answer» tion:CH3-CH=CH-CH3 CONTAINS four carbon ATOMS in straight chain. So, word root is 'But'. As the HYDROCARBON contains a carbon-carbon DOUBLE ... |
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| 51938. |
Solutions are opaque colloids none of thesetransparent |
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Answer» WHAT IS THE QUESTION??????? |
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| 51940. |
आदर्श विलयन के दो उदाहरण बताइए |
| Answer» ANU pastiti and rahur is the CORRECT ANSWER of this QUESTION | |
| 51941. |
Can We Split A Atom? |
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Answer» To SPLIT an atom a neutron, TRAVELLING at just the RIGHT speed, is shot at the nucleus. Under the right CONDITIONS the nucleus splits into two pieces and energy is RELEASED. This process is called nuclear fission. The energy released in splitting just one atom is miniscule. |
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| 51942. |
Ektara or toy telephone |
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Answer» ektaraExplanation:EKTARA is MUSIC INSTRUMENT |
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| 51943. |
What is Absorbent of oxygen |
| Answer» OXYGEN absorbent is a quality PRESERVING AGENT to remove and absorb oxygen in order to prevent above-mentioned deterioration in quality. It is in general classified into two CATEGORIES, inorganic and organic. | |
| 51944. |
How to determine which molecule or compound exist and Which do not exist.? |
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Answer» Determination Methods:-Using general principles of bondingpredict STABILITY using quantum-mechanical calculationsBut there's no CONCRETE THEORY or general PROCESS to do it. |
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| 51945. |
The electron in hydrogen atom is found in what |
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| 51946. |
पॉली हैलाइडू क्या होते है ? इनके रसायनिक गण लिथिए |
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Answer» जब हाइड्रोकार्बन में एक या एक से अधिक हाइड्रोजन परमाणु को हैलोजन परमाणु प्रतिस्थापित करते है तो प्राप्त यौगिक हैलोजन व्युत्पन्न (HALOGEN DERIVATIVE) या हैलाइड कहलाते है। जैसेCH3Cl, CH2CL2, CHCL3, CCL4 आदि। |
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| 51947. |
State the first landmark law of period classification |
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Answer» st periodic law stated by Mendeleev was, "the physical and chemical properties of the elements are a periodic FUNCTION of their atomic WEIGHTS (atomic masses)." The elements having similar properties appeared in the same group (VERTICAL COLUMN).Hᴏᴘᴇ ɪᴛs ʜᴇʟᴘs ʏᴏᴜ ❤ |
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| 51948. |
a substance a substance y undergoes a chemical reaction in which the combined mass of product formed is exactly equal to the mass of y taken for the reaction. what kind of substance is y. |
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Answer» he'll ogood eveninghow are YOUYOU butiful ☺️ |
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| 51949. |
1. Velocity of the electron in the first Bohr orbit? A) 2.18x108 cm/sec B) 2.18x109 m/sec C) Both A & B |
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Answer» tion:Ans) Option A is correct ANSWER Since, it is given that the velocity of the electron in FIRST orbit of H ATOM =2.18×106m/s, Z= 2, n= 4Since, it is given that the velocity of the electron in first orbit of H atom =2.18×106m/s, Z= 2, n= 4So, V3=(2.18×106)nZ=(2.18×106)42=137×23×108=274c or 275c |
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| 51950. |
Radius of an tenth Bohr orbit of h atom is what |
| Answer» RADIUS of tenth BOHR orbit of the hydrogen ATOM is A^0 .Explanation:hope it helps you | |