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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.

1801.

2.2 Give a word equation for each of the following reactions.1. Two solids which combine on heating, to give a liquid.​

Answer»

EXPLANATION:

CARBON + SULPHUR → Carbon DISULPHIDE

1802.

Who is the first president of India?????????​

Answer»

NEHRU is the CORRECT ANSWER FOLLOW me and

1803.

What is galvanizing ?​

Answer»

Answer:

Answer:The most COMMON HOT DIPPING process for industrial applications is galvanizing, which refers to the coating of zinc over iron or steels for rust proofing. It is an extremely versatile and EASY means of providing CORROSION protection for construction materials exposed to atmospheric conditions.

hope helps

1804.

What is electrode , cathode and anode?? ​

Answer»

Answer:

The ANODE is the negative or reducing electrode that releases electrons to the external circuit and oxidizes during and ELECTROCHEMICAL reaction. The Cathode is the POSITIVE or oxidizing electrode that ACQUIRES electrons from the external circuit and is reduced during the electrochemical reaction.

1805.

Short answer questions.1.Name the conditions that control a chemical reaction2. Give a chemical test to identify ammonia.3. What happens when magnesium ribbon is burnt in air? Give the word and chemicalequations4.What happens when an electric current is passed through water ? Give the word and chemical equations.5.What will you observe when hydrochloric acid is added to test tube containing sodium carbonate ? Give the word and chemical equations.6.When ammonium chloride is heated strongly, a gas of specific odour evolves. Give the word and chemical equations. Name the type of this reaction.7. When happens when a moist red litmus paper is brought near the ammonium gas ? 8. Name a compound which on heating releases ammonia gas and a compound which dissociates to give out carbon dioxide gas.​

Answer»

ANSWER:

you COULD GIVE your QUESTIONS SEPARATELY.

1806.

1. The basic unit of matter is _______(a) Element (b) Atom (c) Molecule (d) Electron2. The sub atomic particle revolve around the nucleus is ________(a) Atom (b) Neutron (c) Electron (d) Proton3. __________ is positively charged (a) Proton (b) Electron (c) Molecule (d) Neutron4.The atomic number of an atom is ___________(a) Number of neutrons (b) Number of Protons (c) Total number of Protons and Neutrons (d) Number of atoms5. Nucleons comprises of________________a) Protons and electrons b) Neutrons and electronsc) Protons and neutrons d) Neutrons and Positron6. Atoms which have same atomic number but different mass number are called _______(a) Isobars (b) Isotopes (c) Isotones (d) All of these7. The valency of Magnesium is _______(a) 1 (b) 2 (c) 3 (d) 48. The charge of electron is __________(a) Positive (b) Negative (c) Neutral (d) None of these9. The scientist who discovered the Neutron(a) Dalton (b) Thomson (c) James Chadwick (d) Rutherford10. In which year Dalton atomic theory was proposed(a) 1906 (b) 1808 (c) 1863 (d) 1867​

Answer»

Answer:

1 atom

2.electrons

3.proton.

4.number of PROTONS.....

1807.

What are flame test and borox bead test?​

Answer»

The bead TEST, sometimes called the borax bead or blister test, is an analytical method used to test for the presence of certain metals. The premise of the test is that OXIDES of these metals PRODUCE characteristic colors when exposed to a BURNER FLAME. The test is sometimes used to identify the metals in minerals.

1808.

What are alkaline solution? ​

Answer»

EXPLANATION:

The SOLUTIONS that CONTAIN bases in them are called ALKALINE solution.

HOPE IT HELPS YOU...

1809.

How does an electromagnet work ?If u answer properly i will surely mark you as brainliest

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Answer:

Electromagnets are a different from PERMANENT magnets. Electromagnets are made of coils of WIRE with ELECTRICITY passing through them. Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric CURRENT passing through them, the coils behave like a magnet. When the electricity stops flowing, the coils don’t act like a magnet anymore. Electromagnets are used in a lot of electronic devices when magnetic forces are only needed for short periods of time.

electromagnet drawing

1810.

Long Answer Type QuestionsAnswer the following questions:1. Why is Gandhi Jayanti celebrateing2. Why is 15th August an importa3. Why is our National Flag calle​

Answer»

ANSWER:

because in that DAY GANDHI JI BORN

1811.

Q.6) Study the diagram given below and answer the questions that (04)follow1) Which method of separation is being demonstration in the diagram?2) Define the process3) Name the solid in the mixture which is undergoing the process.​

Answer»

EXPLANATION:

ᴡʜᴇʀᴇ ɪs ᴛʜᴇ ᴅɪᴀɢʀᴀᴍ?????? (*°∀°)=3

1812.

Define the following terms:-​

Answer»

electrolyte :- An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar SOLVENT, such as water. The dissolved electrolyte separates into CATIONS and anions, which DISPERSE uniformly through the solvent. Electrically, such a solution is neutral.

electronode :- one of two POINTS (terminals) where an electric current enters or leaves a battery, etc.

1813.

Question please solve this English practice tense​

Answer»

Answer:

1.Will

2. SHALL have

3. it may

4.will MEET

5.will fly

6.will drive

7.will start

9. will SEE

10.may rain

11. get

12.will open

13.will mark

14.see you

15.take

17. will buy

18. will let

19. start

20.will wait

Explanation:

sorry I can't see the remaining questions properly.

I am no sure about some ANSWERS. so please check it.

Plz Mark me as brainliest.

1814.

Will it make a difference if we swap the anode and cathode in electroplating?

Answer»

Answer:

In one technique, the anode is MADE of the metal to be plated on the part. At the cathode, the DISSOLVED metal ions in the ELECTROLYTE solution are REDUCED at the INTERFACE between the solution and the cathode, such that they "plate out" onto the cathode.

1815.

Since coal and petroleum are perishable, can man make coal and petroleum artificially?.

Answer»

Answer:

EXPLANATION:

no they TAKE a lot of time to be made and CANT be made by US

1816.

1 Give reasons for the following: i] table salt becomes moist and sticky during the rainy seasonii] a white powder forms on the surface of washing soda crystals which are left exposed to the​

Answer»

Answer:

1-NaCl

Explanation:

2-NaCl.5H2SO4

1817.

6. Iron combines with oxygen and ...... of the air to form rust. (nitrogen/moisture)​

Answer»

ANSWER:

moisture

Explanation:

because it was MIXED with IRON and OXYGEN

1818.

A Mars Rover discovered an element X. On analysis using Bohr’s atomic model, it was found that K and L shells of the given element were completely filled, whereas ten more electrons were required to fill M shell. Calculate the atomic number of element 'X

Answer»

Answer:

Explanation:

Bohr diagrams show electrons orbiting the NUCLEUS of an ATOM somewhat like PLANETS ORBIT around the sun. In the Bohr model, electrons are pictured as traveling in circles at different shells, depending on which element you have. Figure  2  contrast the Bohr diagrams for lithium, fluorine and aluminum atoms. The shell CLOSEST to the nucleus is called the K shell, next is the L shell, next is the M

Lithium has three electrons:

two go to K shell and

the remaining one goes to the L shell.

Its electronic configuration is K(2), L(1)

Fluorine has nine electrons:

two go to K shell and

the remaining seven go to the L shell.

Its electronic configuration is K(2), L(7). Note that L can have 8 electrons.

Aluminum has thirteen electrons:

two go to the K shell,

eight go to the L shell, and

remaining three go to the M shell.

Its electronic configuration is K(2), L(8), M(3). Note that the M shell can have 18 electrons.

1819.

Describe the motion of particles in ice, liquid water, and water vapor. Apply the kinetic theory of matter to explain the difference.

Answer»

Answer:

Explanation:

If the ice is HEATED, the ENERGY of the molecules increases. ... If the molecules are heated further, the liquid WATER will become water vapor, which is a gas. Gas particles have more energy and are on AVERAGE at distances from each other which are much larger than the size of the atoms/molecules themselves.

1820.

Dialogue WritingConversation between solid liquid and gas.Please answer fast!I will mark as brainliest!No irrelevant answers plz.​

Answer»

ANSWER:

MAKE me BRAINList

Explanation:

LIKE and follow

THIS IS RIGHT ANSWER

1821.

The region where sun appears only for six months in a year.

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ANSWER:

From early May until late August, the sun sets around midnight and RISES again at around four in the morning in Sweden. In this country, the periods of CONSTANT sunshine last for up to six months of an year.

Explanation:

PLEASE MARK me as brainlest Pleazzzzzz

1822.

A sugar solution with concentration 8.5% (w/w) is made by dissolving ‘X’ g of sugar in 450 g of water. The amount ‘X’ is

Answer»

ANSWER:

BRO 8.5% is for KG or GRAM

1823.

FILL IN THE BLANKS:-1. Common salt is _________2. A mixture contains more than ______ substancemixed in ______ proportion. 3. Properties of a __________ are different from itsconstituent elements, whereas a _______ shows the properties of its constitution​

Answer»

Answer:

1. NACL SODIUM CHLORIDE

1824.

Which of the following is non-planar? a)BF3 b) C2H4 c) XeF4 d) NH3

Answer»

Answer:

a) BF3

Explanation:

Boron has only 3 VALENCE electrons, so when it BONDS with F there will only be 3 electron pairs around the boron atom. Repulsion THEORY predicts that these three e- pairs should find themselves at the VERTICES of an equilateral triangle (bond angles of 120 degrees). Thus, BF3 is planar triangular.

Hope it helps you !!

1825.

WHAT ARE BASES and acids

Answer»

Answer:

Acids are substances which RELEASE H+ IONS in aqueous solution. They TURN blue litmus paper red. Eg- HCL, H2SO4 etc

Bases are substances which release OH- ions in aqueous solution. They turn red litmus blue.Eg- NaOH, CH3COOH, MG(OH)2 etc

1826.

Please answer for my question please you in what 50 points please please please please bhaiya​

Answer»

ANSWER:

why3a DC hg3jygdf4qsadrj5d 8twxtmunyktfszabt

1827.

Is dry heating of lead nitrate a physical change or not? give reason to support your answer​

Answer»

Answer:

it is a CHEMICAL change

Explanation:

LEAD NITRATE on HEATING gives lead oxide and nitrogen dioxide gas is released which is a chemical change

1828.

A solution contains 30 g of glucose, 20 g of salt in 500 ml of water. Calculate the mass percent of glucose and salt (density of water=1 g/ml).

Answer»

ANSWER:

glucose= 60%

salt= 40%

Explanation:

mass %= mass of solute/mass of solution X 100%

mass % of glucose= 30/30+20 X 100

                                = 30/50 X 100

                                = 60%

mass % of salt= 20/30+20 X 100

                                = 20/50 X 100

                                = 40%

1829.

write the science experiments........dont spam............if u spam i will report...........dont copy from google..........if u copy i will report........pls answeer it properly.....if u answer it properly that will be marked as brainliest and will get 20 points...........

Answer»

ANSWER:

but what are the SCIENCE EXPERIMENTS that you WANT to be WRITTEN?

1830.

Write e.c of k and cl

Answer»

EXPLANATION:

K= 1s²2s²2p⁶3s²3p⁶4s¹ or (AR)4s¹

cl= 1s²2s²2p⁶3s²3p⁵ or (NE)3s²3p⁵

1831.

a substance when heated a reddish brown gas is evolved and a reddish brown residue is left behind name the substance​

Answer»

Answer:

its nitrogen GAS

Explanation:

its nitrogen gas. ATOMIC number 7

mark me BRAINLIEST if it helps!!

1832.

What is the symbol of sulphuric hydroxide??​

Answer»

ANSWER:

SODIUM HYDROXIDE(NAOH)

1833.

The mass of saturated solution of Urea in water is 3.7 gram. The solution is evaporated to dryness the mass of residue left is 3.2 gram. Calculate the solubility of Urea in water at the temperature.​

Answer»

Answer:

The solution is EVAPORATED to dryness the MASS of residue left is 3.2 GRAM. Calculate the solubility of Urea in water at the TEMPERATURE. .

1 vote

1834.

Name the three States of matter and definite between them with example

Answer»

ANSWER:

Solid: tightly PACKED.

Dont have the SPACE to MOVE

Liqiud:loosely packed

Have space to move

Gas:Loosely packed

Have LOTS and lots space to move

1835.

Naturally occurring Bromine has a relative atomic mass of 80 and consists entirely of two isotopes of relative atomic masses 79 amd 81.What can be deduced about naturally occurring Bromine from this information only?A Bromine contains the two isotopes in equal proportionsB Bromine has different oxidation statesC Bromine isotopes have different number of protons D Bromine is radioactive plz answer it in 5 mins I need it urgently plz​

Answer»

Answer:

The STATEMENT means that relative ATOMIC MASS that is the ratio of the mass of one ATOM bromine to one twelfth of the mass of carbon atom is given is g m o l E . This conversation is already closed by Expert.

Explanation:

1836.

b) DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion and the other labelled as "Reason R ". You are to examine these two statements carefully and decide if he Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation if the assertion. Select one of the current options, and given below in each questions. Assertion A: The process of conversion of liquid water to its vapours by heating the liquids called evaporation. Reason R: The process of conversion of water vapours to liquid by cooling the vapours is called condensation. A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is not the correct explanation of A. C) A is true but R is false. D) A is false but R is true.

Answer»

Answer:

its OPTION (b)

EXPLANATION:

B) Both A and R are TRUE but R is not the correct explanation of A.

mark me as brainliest if it HELPS!!

1837.

- Nama twooperating systems which are used inmodern mobile phones.​

Answer»

ANSWER:

ANDROID and IOS

Explanation:

hope it will HELP you...........

1838.

वाला ' शब्द का मूलशब्द क्या होगा ?​

Answer»

EXPLANATION:

इस शब्द का कोई मूल शब्द नहीं होता है इसके साथ अगर कोई शब्द जुड़ा हो तभी इसका मूल शब्द होता है

1839.

How many π bonds are present in XeO2F4 molecule​

Answer»

ANSWER:

THREE BONDS I.e HYDROGEN and CHEMICAL with artificial

1840.

Rusting of iron is much faster in rainy season as compared to other reasons.why?​

Answer»

Answer:

Explanation:

RUSTING of iron is faster in rainy SEASON because

rust is FORMED by iron+moiture+oxygen

as in the rainy season it is more humid

rust takes place

please MARK me brainliest if it HELPS!!

1841.

state which type of property is physical or chemical. 1. chlorine gas has a strong irritating odour. 2. the melting point of ice is zero degree celsius. 3. the boiling point of water is hundred degree Celsius. 4. Napthalene on heating directly turns into vapour. 5. hydrogen sulphide gas has a strong rotten egg odour.......... Guys it's urgent pl give me answer I'll mark you as brain list​

Answer»

Answer:

Explanation:

Naphthalene | C10H8 - COMPOUND › Naphthalene

Naphthalene | C10H8 | CID 931 - structure, chemical names, physical and ... InChI=1S/C10H8/c1-2-6-10-8-4-3-7-9(10)5-1/h1-8H ... Colorless to brown SOLID with an odor of mothballs. ... Sublimes appreciably at temperatures above melting POINT; volatile with ... Heat of formation (at 25 °C), kJ/mol: Solid: 78.53; GAS: 150.58.

1842.

If the chemical properties of 2 elements are similar what can we say about the atomic structure​

Answer»

ANSWER:

Radical

Explanation:

FOLLOW KAR DENA

1843.

Classify the following into the elements, compounds and mixtures.Sodium, Soil, Sugar Solution, Silver, Calcium Carbonate, Tin, Silicon, Coal,Air, Soap, Methane, Carbon dioxide, Blood​

Answer»

Explanation:

a. ELEMENTS: Sodium, Silver, Tin, Silicon b. COMPOUNDS: Calcium CARBONATE, Soap, METHANE, Carbon dioxide. c. Mixtures: Soil, Sugar Solution, Coal, Air, BLOOD.

1844.

Write the steps used for making tea by using the words: solution,solvent, solute, dissolve, soluble, insoluble, filtrate and residue.​

Answer»

Answer: pls mark me as brainliest

Explanation:

(i) Tea can be PREPARED by following steps:Take 100ml of water as solvent and BOIL it few minutes. (ii) Now add ONE tea spoon sugar, one tea spoon tea leaves and 50ml of milk.Here sugar, tea leaves and milk are SOLUTE.

(iii) Now boil it again for few minutes so that sugar will dissolves in SOLUTION as sugar is soluble in water

(iv) Now filter the solution. Collect the filtrate in cup. The insoluble tea leaves will be left behind as residue.

1845.

Under a particular pressure and Temperature there will be what of volume of gas (increases or decreases or fixed )

Answer»

ANSWER:

nxbdjhfq I will have ENOUGH TIME to HEAR t

1846.

calculate the concentration of a solution in terms of mass by mass percentage if 20 grams of salt is dissolved in 380 grams of water​

Answer»

CONCENTRATION = 5%

HOPE this ANSWER is HELPFUL

1847.

how is corona virus formed? And why is the virus present in the nature as it is a non living ting if we dont get that in our body?​

Answer»

ANSWER:

what Is meaning of ting

Explanation:

I think U mean thing right????

is it right THANK me

1848.

THE MOLECULES OR ATOMS OF THE GASES MOVE ONLY ABOUT THEIR MEAN POSITIONS. State true or falseplzzz guys answer fast it's urgent I'll mark the 1st answer as brainlist plzzz....​

Answer»

ANSWER:

False

Explanation:

PLEASE MARK BRAINLIEST

1849.

7. Earlier people believed thatcan have power to transform things for better.​

Answer»

Answer:

Leadership is about change, but what is a leader to do when faced with ubiquitous resistance? Resistance to change manifests itself in many ways, from foot-dragging and inertia to petty sabotage to outright rebellions. The best tool for leaders of change is to understand the predictable, universal sources of resistance in each situation and then STRATEGIZE around them. Here are the ten I’ve found to be the most common.

Loss of CONTROL. Change interferes with autonomy and can make people FEEL that they’ve lost control over their TERRITORY. It’s not just political, as in who has the power. Our sense of self-determination is often the first things to go when faced with a potential change coming from someone else. SMART leaders leave room for those affected by change to make choices. They invite others into the planning, giving them ownership.

1850.

2.andare used tocrush, grind and mix solid substances​

Answer»

ANSWER:

GOOD AFTERNOON BROTHER kayasa HO