WorksheetsNTSE 6 (21/08/2020)
Total questions: 25
Worksheet time: 27mins
What is the chemical name of baking soda
Calcium hydroxide
sodium hydroxide
sodium bicarbonate
sodium carbonate
what is the chemical formula of baking soda
NaOH
NaCL
NaHCO3
NH4Cl
which of the following is NOT a use of baking soda
It is used in fire extinguisher
Reduces acidity
used as a fuel
it is used to make baking powder
how is sodium bicarbonate decomposed
photolytic decomposition
thermal decomposition
electrolytic decomposition
all of the above
what is the PH of baking soda
8.5
7
2.5
3
1. Assertion (A) : Bangladesh imports jute from India.
Reason (R) : Bangladesh has most of the jute mills.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.
2. Assertion (A) : The Steam engine was invented by James Watt.
Reason (R) : There was a problem of taking out water from flooded mines.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Assertion (A) : Increase in carbon dioxide would melt polarice.
Reason (R) : Global temperature would rise.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Assertion (A) : Tamil Nadu gets most of the rainfall in winter.
Reason (R) : Tamil Nadu gets rainfall from retreating monsoons.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Assertion (A) : Graphite is slippery and used as a lubricant.
Reason (R) : Graphite has free electrons.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
. A wire of length /, made of material resistivity ρ is cut into two equal parts. The resistivity of the two parts are equal to,
(a) ρ
(b) ρ/2
(c) 2 ρ
(d) 4 ρ
Bile juice is secreted by
Stomach
Pancreas
Small intestine
Liver
Lipase acts on
Amino acids
Fats
Carbohydrates
All of these
Which of these juices is secreted by pancreas?
Trypsin
Pepsin
Bile juice
Both I and II
A wire of length /, made of material resistivity ρ is cut into two equal parts. The resistivity of the two parts are equal to,
(a) ρ
(b) p/2
(c) 2 ρ
(d) 4 ρ
Blood consist of what fluid medium?
Lymph
Platelets
Plasma
All of these
A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is
(a) 2 × 103 joule
(b) 2 × 105joule
(c) 2 × 104 joule
d) 2 × 102 joule
A boy records that 4000 joule of work is required to transfer 10 coulomb of charge between two points of a resistor of 50 Ω. The current passing through it is
(a) 2 A
(b) 4 A
(c) 8 A
(d) 16 A
The resistance whose V-I graph is given below is
A
B
C
D
Two wires of same length and area made of two materials of resistivity ρ1 and ρ2 are connected in series to a source of potential V. The equivalent resistivity for the same area is
A
B
C
D
