EASY
Earn 100

D. Circle the odd one

2. H2O; H2; CO2; CaO

Important Questions on Nature of Matter : Elements, Compounds, and Mixtures

EASY
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Example of an element among the following is
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances

Consider the elements of group-14. Choose the correct alternative:

a) Si and Ge are semiconductors

b) Carbon and silicon are non-metals

c) Sn and Pb are metals

d) Si and Ge are metalloids

MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Reaction between X and Y forms a compound Z. In this reaction X loses electrons and Y gains electrons, then which of the following property is generally not shown by Z?
EASY
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Who gave the definition of an element?
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Which of the following is a compound ?
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
The element which has an intermediate property between a metal and non-metal is known as?
EASY
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
The substances made up of only one type of atoms are called _____.
EASY
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
_____ is a metal which is liquid at room temperature. (Bromine/ Mercury)
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Brass contains _____.
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances

Which of the following is NOT a pure substance ?

MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Which of the following is not a compound?
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Which of the following is a property of non-metal?
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Which of the following statements is not correct -
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Which of the following is not a metal?
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Which of the following can be classified as a pure substance?
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Which of the following is a metalloid?
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Which of the following is the second most abundant metal in the earth's crust?
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
______ is a substance composed of two or more elements, chemically combined with one another in a fixed proportion.
MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances

______ is a basic form of matter that cannot be broken down into simpler substances by chemical reactions.

MEDIUM
Science>Chemistry>Nature of Matter : Elements, Compounds, and Mixtures>Pure Substances
Which of the following can be classified as a pure substance ?