EASY

Earn 100

Which of the following is a physical change?
A. Hammering of a red-hot iron rod to make a flat sheet.
B. Formation of ice by cooling of water.
C. Rising up of water vapors from sea to make clouds.
D. Heating of charcoal in the air to high temperature till it begins to glow.

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Important Questions on Chemistry

MEDIUM

General Science>General Science>Chemistry>Elements and Compounds

Which of the given below atomic numbers of elements resembles the chemical properties of Magnesium?

MEDIUM

General Science>General Science>Chemistry>Elements and Compounds

Group _____ contain non–reactive gases(Noble Gases):

EASY

General Science>General Science>Chemistry>Elements and Compounds

Sodium hydroxide reacts with _____ to form a solution of table salt:

MEDIUM

General Science>General Science>Chemistry>Elements and Compounds

The suffix attached to a hydrocarbon chain ending with a ketone is _____:

EASY

General Science>General Science>Chemistry>Elements and Compounds

Which of these is an essential component of most acids?

MEDIUM

General Science>General Science>Chemistry>Elements and Compounds

The hormone produced in plants due to which the stem bends towards sunlight is _____:

MEDIUM

General Science>General Science>Chemistry>Elements and Compounds

Which of the following non-metal conducts electricity?
(A) Lead
(B) Wood charcoal
(C) Coal
(D) Diamond

MEDIUM

General Science>General Science>Chemistry>Elements and Compounds

A chemical _____ is present in the cork cells to make them impervious to gases and water:

EASY

General Science>General Science>Chemistry>Elements and Compounds

What does

CO

stands for?

EASY

General Science>General Science>Chemistry>Elements and Compounds

How many moles of sulphuric acid are present in 25 gm?

MEDIUM

General Science>General Science>Chemistry>Elements and Compounds

The element with atomic number 57 belongs to _____:

EASY

General Science>General Science>Chemistry>Elements and Compounds

Which of the following metal is used in storage battery?

EASY

General Science>General Science>Chemistry>Elements and Compounds

Catalyst is a substance that_____:

EASY

General Science>General Science>Chemistry>Elements and Compounds

What is formed when helium atom loses one electron?

EASY

General Science>General Science>Chemistry>Elements and Compounds

Which one is not an allotropic form of carbon _____:

HARD

General Science>General Science>Chemistry>Elements and Compounds

Which of the following statement(s) is/are CORRECT?
I. Carbon compounds linked by the only single bond are called saturated compounds.
II. Carbon Compounds having double or triple bonds are called unsaturated compounds.
III. Saturated carbon compounds are more reactive than unsaturated carbon compounds.

MEDIUM

General Science>General Science>Chemistry>Elements and Compounds

_____ element has the largest atom and _____ element has the smallest atom.

EASY

General Science>General Science>Chemistry>Elements and Compounds

Which of the following is known as the 'King of Chemicals'?

EASY

General Science>General Science>Chemistry>Elements and Compounds

Dry ice is_____.

MEDIUM

General Science>General Science>Chemistry>Elements and Compounds

Which of the following is not a bleaching agent?