09-13-2021, 02:52 PM
CBSE 10th std Science First term Sample question paper 2021 with answer keys can be had from the link below.
Some sample questions from the question paper are:
1. The chemical reaction between copper and oxygen can be categorized as:
A. Displacement reaction
B. Decomposition reaction
C. Combination reaction
D. Double displacement reaction
2. How will you protect yourself from the heat generated while diluting a concentrated acid?
A. By adding acid to water with constant stirring.
B. By adding water to acid with constant stirring.
C. By adding water to acid followed by base.
D. By adding base to acid with constant stirring.
3. Opening and closing of stomatal pore depends on:
A. Atmospheric temperature
B. oxygen concentration around stomata
C. carbon dioxide concentration around stomata
D. water content in the guard cells
Click on the link below for more questions..
Some sample questions from the question paper are:
1. The chemical reaction between copper and oxygen can be categorized as:
A. Displacement reaction
B. Decomposition reaction
C. Combination reaction
D. Double displacement reaction
2. How will you protect yourself from the heat generated while diluting a concentrated acid?
A. By adding acid to water with constant stirring.
B. By adding water to acid with constant stirring.
C. By adding water to acid followed by base.
D. By adding base to acid with constant stirring.
3. Opening and closing of stomatal pore depends on:
A. Atmospheric temperature
B. oxygen concentration around stomata
C. carbon dioxide concentration around stomata
D. water content in the guard cells
Click on the link below for more questions..