Chemistry Crash Course NEET>Chapter 1 - Some Basic Concepts of Chemistry>Level 1>Q 11

MEDIUM

NEET

IMPORTANT

Earn 100

The total number of electrons in one mole of peroxide ion is

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Important Questions on Some Basic Concepts of Chemistry

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IMPORTANT

Chemistry Crash Course NEET>Chapter 1 - Some Basic Concepts of Chemistry>Level 1>Q 12

How much mass of

{NH}_{3}

contains the same number of atoms as in

4 g -

atom of oxygen?

HARD

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 1 - Some Basic Concepts of Chemistry>Level 1>Q 13

5.8 L

of a gas at

STP

weighs

7.25 grams

. Then, the gas can be

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Chemistry Crash Course NEET>Chapter 1 - Some Basic Concepts of Chemistry>Level 1>Q 14

Given the number:

161 cm; 0.161 cm; 0.0161 cm

. The number of signification figures for three numbers are:

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IMPORTANT

Chemistry Crash Course NEET>Chapter 1 - Some Basic Concepts of Chemistry>Level 1>Q 15

Prefix Giga means:

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IMPORTANT

Chemistry Crash Course NEET>Chapter 1 - Some Basic Concepts of Chemistry>Level 1>Q 16

There are two common oxides of Sulphur, one of which contains

50 % O_{2}

by weight, the other almost exactly

60 %

. The weights of Sulphur which combine with

1 g

of

O_{2}

(fixed) are in the ratio of:

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IMPORTANT

Chemistry Crash Course NEET>Chapter 1 - Some Basic Concepts of Chemistry>Level 1>Q 17

When

10 mL

of propane (gas) is combusted completely, the volume of

{CO}_{2} (g)

obtained in similar condition is:

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IMPORTANT

Chemistry Crash Course NEET>Chapter 1 - Some Basic Concepts of Chemistry>Level 1>Q 18

Torr is a unit of:

EASY

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IMPORTANT

Chemistry Crash Course NEET>Chapter 1 - Some Basic Concepts of Chemistry>Level 1>Q 19

Centigrade and Fahrenheit scales are related as: