General Science - Online Test
Q1.
A man of mass 70 kg stands on a weighing scale in a lift which is moving upwards with a uniform speed of 10 m . What would be the reading if the lift mechanism failed and it hurtled down freely under gravity?
Answer : Option B
Explaination / Solution:
When the lift falls freely under gravity, a=g
Therefore Apparent weight,
This is the condition of weightlessness.
Q2. In the measurement of resistance by a metre bridge, the current is necessarily reversed through the bridge wire to eliminate
Answer : Option D
Explaination / Solution:
The connecting metal strips include a small resistance in the circuit called the end resistance.
On reversing the current, the end resistance tends to get cancelled out.
Q3. Which disorder is caused due to wild contractions in muscles?
Answer : Option C
Explaination / Solution:
Tetany is caused due to rapid spasms (wild contractions) in muscle due to low Ca++ inbody fluid.
Q4. Alpha lactalbumin present in milk is
Answer : Option A
Explaination / Solution:
The milk produced by transgenic cow contain a protein called alpha lactaalbumin. The milk containing this protein is more suitable for babies as compare to normal cow’s milk.
Q5. An oxidation number of +2 is found in all their compounds of one of the below given options
Answer : Option D
Explaination / Solution:
Alkaline earth metals have in common an outer s- electron shell which is full; that is, that is why orbital contains its full complement of two electrons, which these elements readily lose to form cations with charge +2, and an oxidation state (oxidation number) of +2.
Q6. Which one the following in not an Intra-uterine device
Answer : Option B
Explaination / Solution:
Vaults is not an intra-uterine device used by females to prevent unwanted pregnancy. It is a barrier method of contraception made of rubber.
Q7. Average angle of deflection of α -particles by a thin gold foil predicted by Thomson’s model is
Answer : Option C
Explaination / Solution:
No Explaination.
Q8. Wealth is a
Answer : Option D
Explaination / Solution:
No Explaination.
Q9. Which of the following is an intermediate in the mechanism for amide synthesis through acylation o
Answer : Option C
Explaination / Solution:
- A is the intermediate formed by nucleophilic attack by CH3NH2 on carbonyl carbon of CH3COCl.
Q10. When a capacitor is connected to a battery
Answer : Option B
Explaination / Solution:
When an uncharged capacitor is connected to a battery, charges flow from the poles of the battery to the plates of the capacitor and this process continues till the potential across the capacitor attains the potential difference of the battery. The current flows in the circuit till the time the capacitor is charged and then it ceases.
