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Category: Chemistry MCQs Class 9

Chemistry solved multiple choice questions (MCQs) for class 9 with answers.

How many moles of Na atoms are present in 2.3 g of Na?

(A) 0.15 moles
(B) 1.5 moles
(C) 0.1 moles
(D) 1 moles

Answer: (C) 0.1 moles

Identify the covalent compound

(A) KF
(B) H2O
(C) MgO
(D) NaCl

Answer: (B) H2O

Which of the element of the 3rd period has highest electronegativity?

(A) Na
(B) P
(C) S
(D) Cl

Answer: (D) Cl

Identify of the element which has the largest atomic radius:

(A) Mg
(B) Ca
(C) Cs
(D) Fr

Answer: (D) Fr

The electronic configuration “1S² 2P^6 3S²” belongs to:

The electronic configuration”1S2 2S2 2P6 3S2 ” Belongs to:

IMG_20191214_215253IMG_20191214_215347IMG_20191214_215411
IMG_20191214_215453

Answer: (B)IMG_20191214_215347

 

 

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