Avart Sarni Chemistry

Avart Sarni Chemistry. We covered all the Avart Sarni Chemistry in this post for free so that you can practice well for the exam.

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Avart Sarni Chemistry Objective for Students

The most abundant metal in the Earth's crust is

a) Silicon (Si)

b) Iron (Fe)

c) Aluminium (Al)

d) Copper (Cu)

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Which of the following elements are essential for maintaining a healthy human body? I. Cobalt II. Phosphorus III. Zinc

a) I and II

b) II and III

c) I and III

d) I, II and III

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Which element is typically stored under kerosene oil for safety?

a) Sodium

b) Copper

c) Mercury

d) Silver

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Why do alkali Metals produce characteristic flame colors?

a) They are highly electropositive

b) They have low ionization energies

c) They belong to Group 1 (IA)

d) They form ionic compounds

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What is the chemical formula of common Salt?

a) NaCl₂

b) NaCl

c) Na₂Cl

d) Na₂C

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The chemical formula of washing soda is

a) NaHCO₃

b) Na₂CO₃·10H₂O

c) Na₂CO₃·5H₂O

d) NaOH

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Sodium calcium silicate is commonly known as

a) Hard glass

b) Borosilicate glass

c) Soft glass

d) Jena glass

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Which element among the following has the lowest melting point?

a) Sodium

b) Tin

c) Radon

d) Radium

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When sodium bicarbonate is heated strongly, it produces

a) Sodium carbonate

b) Sodium hydroxide

c) Sodium peroxide

d) Sodium monoxide

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Which is the most reactive metal?

a) Sodium

b) Calcium

c) Iron

d) Potassium

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The heaviest metal among the following is

a) Copper

b) Uranium

c) Aluminium

d) Silver

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Which material is both very hard and highly ductile?

a) Carborundum

b) Tungsten

c) Cast iron

d) Nichrome

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The electron configuration representing a metallic element is

a) 2, 8

b) 2, 8, 7

c) 2, 8, 8

d) 2, 8, 8, 2

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Which is considered the hardest metal?

a) Gold

b) Iron

c) Platinum

d) Tungsten

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