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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.
| 5051. |
Define greenhouse effect |
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Answer» the TRAPPING of the sun's warmth in a planet's lower atmosphere, due to the GREATER transparency of the atmosphere to visible radiation from the sun than to infrared radiation EMITTED from the planet's surface.Explanation:MARK it as brainliest |
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| 5053. |
Unit of measuring percolation rate is |
| Answer» EXPLANATION:minutes per inch The PERCOLATION RATE is usually EXPRESSED in minutes per inch or mpi. | |
| 5054. |
Plz answer they are very urgent plese help |
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Answer» the GAS which is produced is hydrogen.option Cis correct.Explanation:we ALWAYS check the presence of hydrogen by the POP sound it produce.HOPE THIS will HELP u if yes MARK brainlist |
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| 5055. |
Write about 2 factors affecting ionization potential |
| Answer» EXPLANATION:(ii) Effective NUCLEAR charge: The greater the effective charge on the nucleus of an atom, the more DIFFICULT it would be to remove an electron from the atom because ELECTROSTATIC force of attraction between the nucleus and the outermost electron increases. | |
| 5057. |
Match the following Iodine |
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Answer» Where are the OPTIONS? |
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| 5058. |
Question No. 30 When a copper vessel is exposed to moist air for long, it acquires a dull green coating which is a mixture of A) Copper hydroxide and copper nitrate B) Copper oxide and copper nitrate C) Copper carbonate and copper sulphate D) Copper hydroxide and copper carbonate |
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Answer» The CORRECT option is option DEXPLANATION:Copper forms a green deposit on its surface when exposed to air which is usually a MIXTURE of copper CARBONATE and copper hydroxide. |
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| 5059. |
Melting of wax is a chemical and a physical change why? |
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Answer» substances are FORMED. In a BURNING candle, there are both physical and CHEMICAL CHANGES. The melting of the solid wax to FORM liquid wax and the evaporation of liquid wax to form wax vapour are physical changes. The burning of the wax vapour is a chemical change. |
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| 5060. |
A mixture of charcoal and sulphur in CS, which separation method we are used? a) Filterationb) Solvent extractionc) Gravitationd) Distillation |
| Answer» MAY it 3 SOLVENT EXTRACTION | |
| 5061. |
Metals can be beaten into _______ (fill in the blanks) chemistry |
| Answer» BEATEN into THIN PLATE... | |
| 5062. |
Predict thevalency of lead in Lead di-oxide |
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Answer» PbO₂ = Pb⁴⁺ and O²⁻Valency of PB in PbO₂ = +4Explanation: |
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| 5063. |
Give reasons "Why plastic containers are called storing devices" Plz answer fast. Its urgent. |
| Answer» PLZ mrk me as brainlistExplanation: Plastic containers are used as storage DEVICES because it wont get reacted with the substance it stores. METALS can cause some REACTION if the substance STORED is reactive. | |
| 5064. |
Q4. Fill in the blanks. 1. Energy is either absorbed or evolved when a is formed.2.help to increase the production of food.3. Heating causes change in a substance.4. Food items like jams and pickles are protected by using5. A metal which is a liquid at room temperature is6. Kerosene oil and water are twoliquids. |
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Answer» (3).. Latent heat(4).. Preservatives LIKE..(salt and sugar)(5).. Mercury (Hg)(6).. Seperating funnel Explanation:(1).. Energy is absorbed to break bonds, and Energy is EVOLVED as bonds bonds are made(2).. By genetically engineering crop based agriculture.Pls ,if you GOT it right!!, so that's good..other WISE sorry..if you didn't get it..and I have told all answers.. only I have doubt in question (6)..but I have explained also...Thank you for asking raising doubt!!!!All the best |
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| 5065. |
Which of the following is a reversible change? Melting of coal tar on heatingRusting of ironPrinting of paper |
| Answer» MELTING of COAL TAR on HEATING | |
| 5066. |
1.Write the chemical formula and atomicity of the element Sulphur |
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Answer» plz mrk as brainlistExplanation:The most common form of the element SULFUR is composed of molecules that CONSIST of eight atoms of sulfur; its molecular formula is S8 (FIGURE 2). Figure 2. A molecule of sulfur is composed of eight sulfur atoms and is therefore written as S8. |
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| 5067. |
Aisa h kya bestu?? mujhe laga 1 phirend hu isliye sabhi baate share karoge..phir kyu chupaya mujhse..m kya mana kardeti??Sanju dii mere bestuu kisi se kam nhi hain..darr kyu lag rha h?? |
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Answer» For Jeff Bezos, wealth does not come from a monthly paycheck. Amazon only pays its founder a SALARY of $81,000 per YEAR (not INCLUDING the $1.6 million Amazon pays Bezos's for security), a drop in the bucket COMPARED to his OVERALL net worth of an estimated $200 billion.Ntgbut bhut darr lg rhahhehepta nhi kya react krega -,- |
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| 5068. |
True/False 1. Materials are grouped for convenience, studying their uses and their properties. ______ |
| Answer» TRUE EXPLANATION:cggbtghnnvgthnncftbjio | |
| 5069. |
LULL La 1 year 14C के रेडियोएक्टिव क्षय की अर्धायु 5730 वर्ष है। एक पुरातत्व कलाकृति की लकड़ी में, जीवित वृक्ष की लकड़ी की तुलना में 80 % 14 की मात्रा है। नमूने की आयु का परिकलन कीजिए। |
| Answer» 14C के रेडियोएक्टिव क्षय की अर्धायु 5730 वर्ष है। एक पुरातत्व कलाकृति की लकड़ी में, | |
| 5070. |
The electronic configuration of the element whose hydroxide is a weak base Plz answer its urgent |
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Answer» naclExplanation:NACL is WEAK in in BASE ,,,I am not ALSO comform |
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| 5071. |
What are the two types Of pure substances? plaesa give me ans.... |
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Answer» r chemical composition, pure SUBSTANCES get divided into two TYPES – elements and compounds. Elements – An element is a pure substance which CONTAINS a single kind of atom. Such a substance cannot get broken into two or a simpler substance by physical or chemical MEANS. |
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| 5072. |
A chanhe in which heat is absorbed is called |
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Answer» A chemical REACTION or PHYSICAL change is endothermic if heat is ABSORBED by the SYSTEM from the SURROUNDINGS. In the course of an endothermic process, the system gains heat from the surroundings and so the temperature of the surroundings decreases. |
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| 5074. |
Fructose and maltose come under *1 point |
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Answer» ntain two SUGAR units bonded together. There are 3 disaccharides: MALTOSE (GLUCOSE + glucose) Sucrose (glucose + fructose) |
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| 5075. |
Hii friendsHow are you all Suggest a method to liquefy atmospheric gases |
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| 5076. |
12 g of sugar is dissolved in 28 g of water. Find out the Mass of Solution |
| Answer» 40 G is the MASS of SOLUTION. | |
| 5077. |
Please help meit is difficult |
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Answer» hhhhhhh the GREATEST and R the greatest 8iij the greatest the greatest |
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| 5078. |
Which process will take place after mixing eno powder with sooji? which type of chAnge is it-chemical or physical?Give reason for your answer. |
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| 5079. |
Explain groups and period in detail |
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Answer» tion:All the different ELEMENTS are arranged in a CHART called the PERIODIC table. Here are the main features of the table: the horizontal rows are called PERIODS. the vertical columns are called groups. |
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| 5080. |
Immiscible liquids that do not mix with kerosene other than water |
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Answer» ble means that the LIQUIDS don't dissolve in each other – Kerosene oil and WATER are an example. It is possible to shake up the liquids and get them to MIX but they soon SEPARATE. Separating immiscible liquids is done simply using a separating funnel. |
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| 5081. |
Balance the chemical equation Trilead tetroxide>lead monoxide +oxygen |
| Answer» TWO EQUATIONS of CHEMICAL is not BALANCED | |
| 5082. |
The organic substance obtained from dead plants an animal wastes is |
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Answer» humusExplanation: |
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| 5083. |
Describe 2 harmful chemical changes. |
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Answer» of IRON and SPOILAGE of food are the 2 HARMFUL CHEMICAL changes. |
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| 5084. |
Polyester is found blended in different forms.Name them and write an use of each |
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Answer» Polyester is a category of polymers that contain the ester functional group in every repeat unit of their main chain.[1] As a specific material, it most commonly refers to a type called polyethylene TEREPHTHALATE (PET). Polyesters INCLUDE NATURALLY occurring chemicals, in plants and insects, as well as synthetics such as polybutyrate. Natural polyesters and a few synthetic ones are biodegradable, but most synthetic polyesters are not. Synthetic polyesters are used extensively in clothing.Explanation:HOPE it's help u ✨ |
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| 5085. |
Is muslin cloth are separating funnel ? |
| Answer» YES MUSLIN CLOTH are SEPARATING FUNNEL. | |
| 5086. |
how many millimeters of 125(v/v) aqueous propyl alchohol solution would you take to obtain 4.5 ml of propyl alchohol |
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Answer» 10000000000000000000 |
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| 5087. |
The Bay of Bengal is in which state ?( hint : remember it's on the topic of matter) |
| Answer» ANSWER: Liquid STATE! Explanation:I hope this will HELPFUL to you | |
| 5088. |
Write a formulea for the following salts sodium chloride , sodium sulphate |
| Answer» SODIUM chloride-NaCl sodium sulphate-Na2SO4Explanation: | |
| 5089. |
What will happen if a copper plate is not used for an year ?what will be the phenomenon |
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Answer» It will be corrosedExplanation: |
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| 5090. |
When copper is added to iron sulphate solution SO4 is displacedNone of theseIron is displacedNo reaction takes place |
| Answer» NONE of theseExplanation:HOPE it HELPS | |
| 5091. |
a solution contains 50gm of common salt in 360gm water calculate the concentration of solution mass by mass percentage. |
| Answer» 410 gramExplanation: SALT = 50 GRAM Water = 360 gram SOLUTION = 410 gram So the Answer Is 410 Gram | |
| 5092. |
Q.no.2) For the given molecular formulae draw the structure and write their name according to the IUPAC rules. i) CH3CH2CHCICH3. ii) CH3CH2COOH. |
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| 5093. |
what mass of silver chloride will be obtained by adding an access of hydrochloric acid solution of 0.34g of sliver nitrate |
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Answer» What mass of silver CHLORIDE will be obtained by adding an excess of hydrochloric ACID to a solution of 0.34 G of silver NITRATE? [Cl=35.5, Ag=108, N=14, O=16, H=1] |
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| 5094. |
Give any three examples of acids and bases each and list any one use of each CLASS 7 ACIDS, BASES, AND SALT |
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Answer» Mineral ACIDS: Sulphuric acid (H2SO4), Nitric acid(HNO3)Organic Acids: Citric acid(C6H8O7), ACETIC acid(CH3COOH)Alkalis: Potassium hydroxide(KOH), Sodium hydroxide(NaOH)Weak Bases: Copper hydroxide [Cu(OH)2], Ammonium hydroxide(NH4OH)Strong Bases: Potassium hydroxide(KOH), Sodium hydroxide(NaOH) |
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| 5095. |
Method adopted for experimental investigation one word answer |
| Answer» TION:GOOD MORNING my FRIENDS | |
| 5096. |
An atom X has 20 electrons and 20 neutrons, its mass number is |
| Answer» | |
| 5097. |
Let us compare these common fuels coal, biogas and LPG. Which one among these fuels will burn without a flame? When the same mass of fuel is burnt in air, which one of these will be most efficient in producing heat energy? |
| Answer» LIQUID PETROLEUM gas.plz LIKE my ANSWER. | |
| 5098. |
Find the initial volume of gas at 150k , if the final volume is 6L at 100k Please answer fast |
| Answer» TION:When were these SCHEMES INTRODUCED? B) WRITE the advantages of these schemes. | |
| 5099. |
list five changes that you have observe in every day life classify them into reversible or irreversible change |
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Answer» s of REVERSIBLE changesMelting: Melting is when solid CONVERTS into a liquid after heating. EXAMPLE of melting is TURNING of ice into water.Freezing: Freezing is when a liquid converts into a solid. Example of freezing is turning of water into ice.BOILING: Boiling is when a liquid converts into a gas. |
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| 5100. |
What is the effect of temperature on the solubility of a gas in liquid solution? |
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Answer» Effect of temperature on solubility of a gas in a liquid: 1. ACCORDING to Charles’ law, volume of a given mass of a gas increases with increase in temperature. 2. Therefore, volume of a given mass of dissolved gas in solution ALSO increases with increase in temperature, so that it becomes impossible for the SOLVENT in ... |
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