Whether a concave lens is called a converging or diverging lens? Answer with reason. [For External Candidates]
A concave lens is called a diverging lens.
Reason:
When parallel rays of light pass through a concave lens, they diverge or spread out after refraction.
Question ID: 417
Uploaded on: September 26, 2024
Write, with the balanced chemical equation, what happens when dilute sulfuric acid is added to ferrous sulfide. [For External Candidates]
When dilute sulfuric acid (H2SO4) is added to ferrous sulfide (FeS), a chemical reaction occurs, producing hydrogen sulfide gas (H2S) which has a characteristic rotten egg smell and ferrous sulfate (FeSO4).
Balanced Chemical Equation:
FeS + H2SO4 →FeSO4 + H2S
Question ID: 418
Uploaded on: September 26, 2024
Give two reasons in favour of using paper for packaging. [For External Candidates]
Reasons for Using Paper for Packaging:
Question ID: 419
Uploaded on: September 26, 2024
Some flowers are open after sunrise and close after sunset. This is –
Photonasty.
Explanation
Photonasty is a nastic movement that is associated with changes in light intensity.
Question ID: 420
Uploaded on: October 7, 2024
A person affected with Diabetes Mellitus is unable to secrete which of the following hormones in adequate quantity-
Question ID: 421
Uploaded on: October 7, 2024
The part of the human brain associated with controlling body temperature is
(c) Hypothalamus
Explanation
The part of the human brain associated with controlling body temperature is the hypothalamus.
Question ID: 422
Uploaded on: October 7, 2024
You have observed the separation of two sister chromatids at one stage of mitotic cell division the stage is
(c) Anaphase
Explanation:
The stage of mitosis where the separation of two sister chromatids occurs is anaphase.
Question ID: 423
Uploaded on: October 7, 2024
Which of the following pairs is correct
(a) Budding-Yeast
Explanation:
The correct pair is Budding-Yeast. Budding is a type of asexual reproduction in which a small bud grows off of the parent cell.
Question ID: 424
Uploaded on: October 7, 2024
Which phase of human development is associated with the maturity of reproductive organs and reproductive gland –
(b) Adolescence
Explanation:
The phase of human development associated with the maturity of reproductive organs and reproductive glands is adolescence.
Question ID: 425
Uploaded on: October 7, 2024
Which of the following traits in pea plant is recessive –
(a) Wrinkled seed
Explanation:
The recessive trait in pea plant is a wrinkled seed. The dominant trait is a round seed. The other options are all dominant traits.
Question ID: 426
Uploaded on: October 7, 2024
How many types of gametes are formed by pea plants having genotype YyRr?
(b) 4
Explanation:
The possible types of gametes are: YR, Yr, yR, and yr.
Question ID: 427
Uploaded on: October 7, 2024
The probability of haemophilic girl children born to a haemophilia carrier mother and normal father is –
(b) 0 %
Explanation:
The probability of having a hemophilic girl from a carrier mother (XHXh) and a normal father (XHY) is 0. A girl needs two X chromosomes, but the father can only pass on a normal XH. Therefore, it's impossible for a hemophilic girl to be born in this case.
Question ID: 428
Uploaded on: October 7, 2024