Sets
Chemistry Set 5
30 questions 1. A metal carbonate reacts with an acid to give a salt, water and:
2. In electrolytic refining, the insoluble impurities that settle at the bottom of the anode are called:
3. The white insoluble substance formed when carbon dioxide reacts with lime water is:
4. An atom with fewer than four valence electrons generally:
5. One atomic mass unit is defined as a mass exactly equal to:
6. Covalent compounds are generally poor conductors of electricity because:
7. Which compound is used in soda-acid fire extinguishers?
8. Which of the following allotropes of carbon is smooth and slippery?
9. Consider the following statements:
(I) Salts of a strong acid and a strong base are neutral with pH 7.
(II) Salts of a strong acid and a weak base are acidic with pH less than 7.
(III) Salts of a strong base and a weak acid are acidic in nature.
Which of the above is/are correct?
10. The catalyst used in the hydrogenation of vegetable oils is:
11. A metal oxide reacts with an acid to give:
12. The mass of 0.5 mol of carbon dioxide (molar mass 44.01 g mol⁻¹) is:
13. Assertion (A): 2 g of hydrogen combines with 16 g of oxygen to form 18 g of water.
Reason (R): According to Dalton's atomic theory, atoms combine in a simple whole number ratio to form compounds.
14. The chemical formula of gypsum is:
15. In the long form of the periodic table, the horizontal rows are called:
16. Litmus is extracted from:
17. A mixture with uniform composition throughout is called a:
18. Large brown crystals of common salt, formed when seas of bygone ages dried up, are called:
19. A 5–8% solution of acetic acid in water is called:
20. The solution of the product formed on burning magnesium in air: