Class X Science
Subject: Chemistry
Metals and Non-Metals
Q. 1. The non-metal which is liquid at room temperature is:(A) Mercury
(B) Bromine
(C) Carbon
(D) Helium
Right Ans:- Bromine
Q. 2. The number of protons in an atom of an element A is 19 then, the number of electron in its ion A+ is:
(A) 18
(B) 19
(C) 20
(D) 21
Right Ans:- 18
Q. 3. Bauxite is an ore of
(A) Iron
(B) Aluminium
(C) Mercury
(D) Copper
Right Ans:- Aluminium
Q. 4. The metal which is liquid at room temperature is
(A) Bromine
(B) Mercury
(C) Iodine
(D) Potassium
Right Ans:- Mercury
Q. 5. The sulphide ores are converted into oxides by heating strongly in the presence of excess air. This process is known as
(A) Roasting
(B) Smelting
(C) Calcination
(D) Refining
Right Ans:- Roasting
Q. 6. In electrolytic refining, the cathode is made up of
(A) Impure metal
(B) Pure metal
(C) Metallic salt
(D) Alloy
Right Ans:- Pure metal
Q. 7. In the given reaction, Al2O3 + NaOH → ……X…… + H2O. then What is element X?
(A) NaAlO2
(B) Na3Al
(C) Na2O3
(D) NaAl2O3
Right Ans:- NaAlO2
Q. 8. Which of the following represent the correct order of decreasing reactivity?
(A) Mg > Al > Zn > Fe
(B) Mg > Zn > Al > Fe
(C) Al > Zn > Fe > Mg
(D) Mg > Fe > Zn > Al
Right Ans:- Mg > Al > Zn > Fe
Q. 9. Which among the following is the most abundant metal found in the earth’s crust?
(A) Magnesium
(B) Oxygen
(C) Aluminium
(D) Iron
Right Ans:- Aluminium
Q. 10. Which of the following pairs will give displacement reactions?
(A) NaCl solution and copper metal
(B) MgCl2 solution and aluminium metal
(C) FeSO4 solution and silver metal
(D) AgNO3 solution and copper metal
Right Ans:- AgNO3 solution and copper metal
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