Chemistry-Periodic Classification of Elements (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 11 - 15 of 23

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Question number: 11

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

An element is soft and can be cut with a knife. It is very reactive and cannot be kept open in the air. It reacts vigorously with water. Can you name this element?

Choices

Choice (4) Response

a.

Mg

b.

S

c.

P

d.

Na

Question number: 12

» Chemistry » Periodic Classification of Elements

Match List-Ⅰ List-Ⅱ▾

Question

match the following:
List-Ⅰ (List I) List-Ⅱ (List II)

(A)

Lothal

(i)

Traces of a dock and ship on seal

(B)

ChanhuDaro

(ii)

Discovery of skeleton of horse

(C)

Kalibangan

(iii)

Evidence of ploughing the fields

(D)

Surkotada

(iv)

Bead making

Choices

Choice (4) Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (i)
  • (iv)
  • (iii)
  • (ii)

b.

  • (iv)
  • (iii)
  • (i)
  • (ii)

c.

  • (iii)
  • (iv)
  • (i)
  • (ii)

d.

  • (iv)
  • (ii)
  • (i)
  • (iii)

Question number: 13

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

What is the most correct name for the ionic compound formed by Fe+2+Cl ?

Choices

Choice (4) Response

a.

Iron (II) chloride

b.

Iron (I) chloride

c.

Iron (III) chloride

d.

Iron (IV) chloride

Question number: 14

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

SnO2+H2Sn+H2O . This is an unbalanced equation. Write its balanced equation.

Choices

Choice (4) Response

a.

SnO2+2H2Sn+2H2O2

b.

SnO2(s)+2H2Sns+2H2O2

c.

SnO2+H2Sn+2H2O2

d.

SnO2(s)+2H2(g)Sn(s)+2H2O2(g)

Question number: 15

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

AgNO3(aq)+NaCl(aq)AgCl(aq)+NaNO3(aq) .

It is an example of

Choices

Choice (4) Response

a.

decomposition reaction

b.

displacement reaction

c.

double displacement reaction

d.

redox reaction

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