143- Excess of Ag₂CrO₄ was dissolved in distilled water its solubility was found to be 1.3 × 10⁻⁴ mol dm⁻³. What is the solubility product:
A. Ksp = [1.3 × 10⁻⁴]² [1.3 × 10⁻⁴]
B. Ksp = [2.6 × 10⁻⁴]² [1.3 × 10⁻⁴]
C. Ksp = [1.3 × 10⁻⁸][1.3 × 10⁻⁴]
D. Ksp = [1.3 × 10⁻⁸]² [1.3 × 10⁻⁴]²
View Answer
Answer : B. Ksp = [2.6 × 10⁻⁴]² [1.3 × 10⁻⁴]
Description
144- Double fertilization occurs in:
A. Pinus
B. Ferns
C. Marchantia
D. Maize
View Answer
Answer : D. Maize
Description
145- Most conspicuous sea-weeds are:
A. Red-algae
B. Blue-algae
C. Green-algae
D. Brown-algae
View Answer
Answer : D. Brown-algae
Description
146- An acinus is composed of:
A. 10-20 Acinar cells
B. 20-40 Acinar cells
C. 20-30 Acinar cells
D. 30-40 Acinar cells
View Answer
Answer : B. 20-40 Acinar cells
Description
147- A circular disc of mass M and radius R is rotating about its axis with uniform speed v. Its kinetic energy is:
A. Mv²
B. ½ Mv²
C. ¼ Mv²
D. ⅛ Mv²
View Answer
Answer : C. ¼ Mv²
Description
148- Moment of inertia of an object does not depend upon:
A. Mass of object
B. Mass of distribution
C. Angular velocity
D. Axis of rotation
View Answer
Answer : C. Angular velocity
Description
149- A body of mass 10 kg is hanging from a spring inside a lift. If the lift falls with an acceleration 10ms⁻² then what will be the reading of spring balance:
A. Zero
B. 2.5 kg
C. 5 kg
D. 10 kg
View Answer
Answer : A. Zero
Description
150- That a driver swerves in order to avoid an accident can be proven by examining the marks on the pavements. (The underlined word nearly means)
A. Stops quickly
B. Turns sharply
C. Hits something else
D. Goes backward
View Answer
Answer : B. Turns sharply
Description
151- A container is having mixture of gases, 20% ammonia, 30% hydrogen and 50% oxygen under 50 atm pressure choose the correct partial pressure respectively.
A. 10 atm, 25 atm, 15 atm
B. 10 atm, 15 atm, 25 atm
C. 25atm, 10 atm, 15 atm
D. 15 atm, 25 atm, 10 atm
View Answer
Answer : B. 10 atm, 15 atm, 25 atm
Description
152- A man walk for some time with velocity v due east. Then he walks for same time with velocity v due north . The average velocity for man is:
A. 2v
B. v√2
C. v
D. v/√2
View Answer
Answer : D. v/√2
Description
153- The Sum of 2 forces acting at a point is 16N. If the resultant force is 8N and its direction is perpendicular to minimum force, then the force is:
A. 6N and 10N
B. 8N and 8N
C. 4N and 12N
D. None of these
View Answer
Answer : A. 6N and 10N
Description
154- A boy walks to his school at a distance of 6km with a speed of 3km/h and walks back with a constant speed of 2km/h. His average speed for round trip in km/h is:
A. 2.3
B. 2.4
C. 2.5
D. 5
View Answer
Answer : B. 2.4
Description
155- Though Aleem is poor ______ he is honest.
A. but
B. nevertheless
C. yet
D. still
View Answer
Answer : C. yet
Description
156- Which cation is unstable in aqueous solution?
A. Sb³⁺
B. Bi³⁺
C. Sn³⁺
D. Fe³⁺
View Answer
Answer : C. Sn³⁺
Description
157- Choose the incorrect statement about corrosion:
A. Corrosion cannot be eliminated completely
B. Employing modern techniques corrosion can be completely eliminates
C. The presence of acidic oxide in the environment can accelerate the process of corrosion
D. Corrosion process can be slowed down by certain methods
View Answer
Answer : B. Employing modern techniques corrosion can be completely eliminates
Description
158- AlBr₃ which is used in the alkylation of benzene possesses the properties of:
