Chemistry-Periodic Classification of Elements (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 1 - 5 of 23

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Question number: 1

» Chemistry » Periodic Classification of Elements

Match List-Ⅰ List-Ⅱ▾

Question

Match the following:
List-Ⅰ (Example Of Reaction) List-Ⅱ (Type Of Reaction)

(A)

CH 4 (g) +2O 2 (g) – > CO 2 (g) +2H 2 O (g)

(i)

Precipitation reaction

(B)

2AgCI (s) – > 2Ag (s) + CI 2 (g)

(ii)

Combination reaction

(C)

Fe (s) +CuSO 4 (aq) – > FeSO 4 (aq) + Cu (s)

(iii)

Displacement reaction

(D)

AgNO 3 + HCI – > AgCI + HNO 3

(iv)

Decomposition reaction

Choices

Choice (4) Response
  • (A)
  • (B)
  • (C)
  • (D)
a.
  • (ii)
  • (iii)
  • (i)
  • (iv)
b.
  • (iv)
  • (i)
  • (iii)
  • (ii)
c.
  • (ii)
  • (iv)
  • (iii)
  • (i)
d.
  • (iii)
  • (ii)
  • (iv)
  • (i)

Question number: 2

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

2KClO32KCl+3O2

The above reaction is an example of a

Choices

Choice (4) Response
a.

displacement reaction

b.

double displacement reaction

c.

combination reaction

d.

decomposition reaction

Question number: 3

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

Who compared the properties of elements with notations of music and propounded ‘law of octaves’ for the classification of elements?

Choices

Choice (4) Response
a.

Newland

b.

Mendeleef

c.

Dobereiner

d.

Lothal Mayer

Question number: 4

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

An element X forms and oxide X 2 O 3. In which group of Mendeleef s periodic table is this element located?

Choices

Choice (4) Response
a.

Group II

b.

Group III

c.

Group VIII

d.

Group V

Question number: 5

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?

Choices

Choice (4) Response
a.

By cyanobacteria

b.

By denitrification

c.

By electrical discharges in the atmosphere

d.

By industrially synthesised fertiliser

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