Question

bjective Questions
hoose the correct option.
1. Which of the following symbols is not derived from the Latin name of the element?
(a) Fe
(b) Cu
(c) Cr
2. Which of the following symbols is derived from the Latin name of the element?
(d) Pb
(a) He
(b) Ne
(c) Mg
(d) Ag
3. Which element among the ones appearing below is pentavalent?
(a) CaO
(b) NHÀ
(c) MgSO4
(d) PCI
4. What is the valency of Mg in Mg,N,?
(a) 1
(b)2
(c) 3
(d) 4
5. What is the value of x in the following equation?
CaCO3(s) + xHCl(aq) — CaCl2 (aq) + H2O(1) + CO2(g)
(a) 1
(b) 2
(c) 3
(d) 4
6. Which of the following is not a balanced chemical equation?
(a) CaCO, CaO+CO,
(b) 2KCIO, - KCl +30,
(c) SO,+H2O -- H,SO,
(d) CO,+H,0-H,CO
​

Answer 1

1. (b) Copper (Cu)

2. (a) Lead (Pb) , Latin name - Plumbum

3. (c) MgSo4 ••••• not sure

4. (b) 2

5. (b) 2

6. (c)

Answer 2

Answer:

1. (c)Cr

2. (b)Pb

Latin name - Plumbum

3. (d)PCl

4. (b)2

5. (b)2

6. (c)

Hope it helps you!!!!!