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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.
| 6351. |
What is the oxidation number of oxygen in K2O? (Oxidation number of potassium is +1)-2 |
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Answer» What is the oxidation number of oxygen in K2O? (Oxidation number of potassium is +1)
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| 6352. |
Which one is the formula of formaldehyde? |
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Answer» Which one is the formula of formaldehyde? |
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| 6353. |
Which one of the following has the maximum metallic character? |
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Answer» Which one of the following has the maximum metallic character? |
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| 6354. |
What do you understand by the water of crystallisation? Give four substances which contain water of crystallisation and write their common names. |
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Answer» What do you understand by the water of crystallisation? Give four substances which contain water of crystallisation and write their common names. |
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| 6355. |
The valency of aluminium is : |
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Answer» The valency of aluminium is : |
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| 6356. |
Question 34 If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride? |
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Answer» Question 34 If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride? |
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| 6357. |
Question 26 A solution of potassium chloride when mixed with silver nitrate solution, forms an insoluble white substance. Write the chemical reaction involved and also mention the type of the chemical reaction. |
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Answer» Question 26 |
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| 6358. |
What is hydrochloric acid |
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Answer» What is hydrochloric acid |
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| 6359. |
X and Y are the two extreme elements of the series which obey Newland's law of octaves. How many elements are there in between X and Y? |
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Answer» X and Y are the two extreme elements of the series which obey Newland's law of octaves. How many elements are there in between X and Y? |
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| 6360. |
What is 300K in Celsius scale? |
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Answer» What is 300K in Celsius scale? |
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| 6361. |
How can we separate a mixture of camphor and ammonium chloride ? |
| Answer» How can we separate a mixture of camphor and ammonium chloride ? | |
| 6362. |
Latent heat of fusion of two liquids A and B is 100 j/kg and 150j/kg respectively. Which one will produce more cooling. Effect and why? |
| Answer» Latent heat of fusion of two liquids A and B is 100 j/kg and 150j/kg respectively. Which one will produce more cooling. Effect and why? | |
| 6363. |
Valency of Calcium element is: |
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Answer» Valency of Calcium element is: |
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| 6364. |
Identify the pair of inert elements from the following. |
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Answer» Identify the pair of inert elements from the following. |
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| 6365. |
Any chemical element (X) can be represented asZXA where ‘Z’ is an atomic number and ‘A’ is the mass number. The Atomic number refers to the number of protons and the mass number refers to the sum of protons and neutrons in an atom. For an element, calcium which has 20 protons and 20 neutrons, identify the correct representation: |
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Answer» Any chemical element (X) can be represented asZXA where ‘Z’ is an atomic number and ‘A’ is the mass number. The Atomic number refers to the number of protons and the mass number refers to the sum of protons and neutrons in an atom. For an element, calcium which has 20 protons and 20 neutrons, identify the correct representation: |
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| 6366. |
The electronic configuration of an element Z is 2, 8, 8. (a) What is the atomic number of the element? (b) State whether element Z is a metal or non-metal. (c) What type of ion (if any) will be formed by an atom of element Z? Why? (d) What is special about the outermost electron shell of the atom of this element? (e) Give the name and symbol of element Z. (f) Name the group of elements to which Z belongs. |
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Answer» The electronic configuration of an element Z is 2, 8, 8. |
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| 6367. |
Which of the following are the allotropes of carbon? |
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Answer» Which of the following are the allotropes of carbon? |
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| 6368. |
A group of atoms carrying a charge is known as a/an________________. |
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Answer» A group of atoms carrying a charge is known as a/an________________. |
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| 6369. |
(a) Define solubility of a substance. How does it vary with temperature ? (b) What do you understand by the statement "the solubility of copper sulphate in water at 20∘C is 20.7 g" ? (c) What is the effect of temperature on the solubility of solids in liquids ? |
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Answer» (a) Define solubility of a substance. How does it vary with temperature ? (b) What do you understand by the statement "the solubility of copper sulphate in water at 20∘C is 20.7 g" ? (c) What is the effect of temperature on the solubility of solids in liquids ? |
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| 6370. |
Name a hydrocarbon with 5 carbons in a chain and the last carbon there is an alcohol group attached to it. |
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Answer» Name a hydrocarbon with 5 carbons in a chain and the last carbon there is an alcohol group attached to it. |
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| 6371. |
Which of the following equations represents a redox reaction: |
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Answer» Which of the following equations represents a redox reaction: |
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| 6372. |
Give two resons to justify that : (a) Water is a liquid at room temperature. (b) An iron almirah is a solid. |
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Answer» Give two resons to justify that : (a) Water is a liquid at room temperature. (b) An iron almirah is a solid. |
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| 6373. |
Match the entries given in column A with appropriate ones from column B Column AColumn B(A) Invisible atoms (a) Rutherford's atomic model(B) Mass of an atom is concentrated at the centre(b) Dalton's atomic theory(C) Energy levels(c) Thomson's atomic model(D) Plum pudding model(d) Bohr's model |
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Answer» Match the entries given in column A with appropriate ones from column B |
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| 6374. |
Define : (a) a physical change (b) a chemical change |
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Answer» Define : (a) a physical change (b) a chemical change |
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| 6375. |
Discuss the effect of pressure on solubility of gases in liquid? When we open the cap of a cola drink (or any carbonated beverage), why does gas bubbles come out? [3 MARKS] |
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Answer» Discuss the effect of pressure on solubility of gases in liquid? When we open the cap of a cola drink (or any carbonated beverage), why does gas bubbles come out? [3 MARKS] |
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| 6376. |
What would happen, if all the oxygen present in the environment is converted to ozone? |
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Answer» What would happen, if all the oxygen present in the environment is converted to ozone? |
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| 6377. |
Which of the following change represents sublimation a) solid to liquid b) liquid to gas c) solid to gas d) gas to liquid |
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Answer» Which of the following change represents sublimation a) solid to liquid b) liquid to gas c) solid to gas d) gas to liquid |
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| 6378. |
Why people sprinkle water on the roof after a hot sunny day? |
| Answer» Why people sprinkle water on the roof after a hot sunny day? | |
| 6379. |
Atomic mass of hydrogen (H) is___u. |
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Answer» Atomic mass of hydrogen (H) is |
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| 6380. |
Which is the weakest oxidising agent among the following? |
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Answer» Which is the weakest oxidising agent among the following?
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| 6381. |
A traffic signal board, indicating "School Ahead", is an equilateral triangle with side "a". The area of the signal board will be given by______. |
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Answer» A traffic signal board, indicating "School Ahead", is an equilateral triangle with side "a". The area of the signal board will be given by______. |
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| 6382. |
IUPAC name of (C2H5)2CHCH2OH(C2H5)2CHCH2OH is |
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Answer» IUPAC name of (C2H5)2CHCH2OH(C2H5)2CHCH2OH is |
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| 6383. |
Subscripts in the chemical formula X2Y3 denotes: A. 2 atoms of X combine with 3 atoms of Y to form X2Y3 B. The subscript 2 denotes that valency of X is 2. |
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Answer» Subscripts in the chemical formula X2Y3 denotes: A. 2 atoms of X combine with 3 atoms of Y to form X2Y3 B. The subscript 2 denotes that valency of X is 2. |
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| 6384. |
Symbol of an element represents: |
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Answer» Symbol of an element represents: |
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| 6385. |
What should I study for ancq (Australian National chemistry Quiz) I have already studied 9 the chemiatry in ncert |
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Answer» What should I study for ancq (Australian National chemistry Quiz) I have already studied 9 the chemiatry in ncert |
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| 6386. |
Can we consider the corpuscular theory of newton and quantum theory of Einstein to be same if we assume the corpuscles to exhibit wave nature? |
| Answer» Can we consider the corpuscular theory of newton and quantum theory of Einstein to be same if we assume the corpuscles to exhibit wave nature? | |
| 6387. |
One atmosphere is approximately = ___ |
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Answer» One atmosphere is approximately = |
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| 6388. |
Question 36 Compute the difference in masses of 103 moles each of magnesium atoms and magnesium ions. (Mass of an electron =9.1×10−31kg) |
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Answer» Question 36 Compute the difference in masses of 103 moles each of magnesium atoms and magnesium ions. (Mass of an electron =9.1×10−31kg) |
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| 6389. |
Which of the following are isotopes? |
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Answer» Which of the following are isotopes? |
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| 6390. |
What is/are the postulates of Modern Atomic Theory? |
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Answer» What is/are the postulates of Modern Atomic Theory? |
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| 6391. |
Identify X in the following reaction X+ Acid → Salt +H2O |
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Answer» Identify X in the following reaction |
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| 6392. |
A hydrocarbon is an organic compound made of nothing more than carbon and ___. |
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Answer» A hydrocarbon is an organic compound made of nothing more than carbon |
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| 6393. |
State the properties of an element used for its identification |
| Answer» State the properties of an element used for its identification | |
| 6394. |
In summer season, after rain why is it the heat so unbearable? |
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Answer» In summer season, after rain why is it the heat so unbearable? |
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| 6395. |
Why air is considered as a mixture and not a compound? |
| Answer» Why air is considered as a mixture and not a compound? | |
| 6396. |
Three objects A, B, and C having density 1.12 g cm-3, 0.92 g cm-3 and 2.02 gcm-3 respectively, are placed in a water tank. Which object will sink in water tank? |
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Answer» Three objects A, B, and C having density 1.12 g cm-3, 0.92 g cm-3 and 2.02 gcm-3 respectively, are placed in a water tank. Which object will sink in water tank? |
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| 6397. |
Explain what are so, solidsol, aerosol, emultion, foam, solidfoam,gel along with examples of each and tell what is dispersed phase and dispersed medium in each of them. |
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Answer» Explain what are so, solidsol, aerosol, emultion, foam, solidfoam,gel along with examples of each and tell what is dispersed phase and dispersed medium in each of them. |
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| 6398. |
If one mole of carbon atoms weighs 12 grams, what is the mass( in grams) of 1 atom of carbon? |
| Answer» If one mole of carbon atoms weighs 12 grams, what is the mass( in grams) of 1 atom of carbon? | |
| 6399. |
Name the particles used by Rutherford in his experiment on the discovery of nucleus. Also state the charge on these particles. |
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Answer» Name the particles used by Rutherford in his experiment on the discovery of nucleus. Also state the charge on these particles. |
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| 6400. |
Does food cook faster on hill tops? |
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Answer» Does food cook faster on hill tops? |
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