Correct Answer: Secondary pollutant

Solution : The correct option is secondary pollutant.

Chemically, peroxyacetyl nitrate has the formula C₂H₃NO₅ It is a major contributor to smog and a secondary pollutant. Through a sequence of chemical processes involving volatile organic chemicals, nitrogen oxides, and sunlight, peroxyacetyl

Correct Answer: 0

Solution : Given: $a+b+c = 0$
Solution:
$\frac{1}{(a+b)(b+c)}+\frac{1}{(b+c)(c+a)}+\frac{1}{(c+a)(a+b)}$
Taking the LCM, we get
= $\frac{(c+a)+(a+b)+(b+c)}{(a+b)(b+c)(c+a)}$
= $\frac{2(a+b+c)}{(a+b)(b+c)(c+a)}$
Substituting the value of $(a+b+c)$ in the equation:
= $\frac{2\times 0}{(a+b)(b+c)(c+a)}$
= 0
Hence, the correct answer is 0.

Correct Answer: Only conclusion III follows

Solution : According to the given statements, the following Venn diagram can be drawn –

Let's check each conclusion –
Conclusion I: Some houses are factories – As per the above Venn diagram, it is clear that there is no direct relation between houses

Correct Answer: Megasthenes

Solution : The correct option is Megasthenes.

The author of Indica, an account of India under the reign of the Maurya dynasty, was Megasthenes. The original text of 'Indica' has been lost, but fragments of it survive in the works of later Greek and Latin authors. These

Correct Answer: 1800°

Solution : Given: Sides of the polygon, $n$ = 12
A polygon with $n$ sides has an interior angle sum = $(n -2)×180°$
= $(12 - 2)×180°$
= $10×180°$
= $1800°$
Hence, the correct answer is 1800°.

Correct Answer: Streptomycin

Solution : The correct option is -  Streptomycin

For his successful studies of the soil microbes," which helped discover streptomycin, Waksman won the Nobel Prize in 1952. Waksman's discovery of streptomycin led to him being referred to as "one of the greatest benefactors to mankind" during the

Correct Answer: 10 km

Solution : As per the given information, the movement of the man looks as follows –

The direct distance between his starting point and the endpoint is AD as shown below –

Produce DC to O and join AO to form a right-angled triangle at O,

Correct Answer: 1490

Solution : If one candidate received R% of total votes, the other candidates received (100 – R)% of total votes.
Let the total number of votes recorded be $x$.
60% of the votes went to the winning candidate.
According to the question,
(60 – 40)% of $x$

Correct Answer: (3)

Solution : The correct answer is the third option.

The use of the infinitive verb form to go on tours is not appropriate after the verb enjoys. The verb form should be a gerund (the -ing form of the verb) to convey that he finds enjoyment in

Correct Answer: Our country witnessed a terrible disaster.

Solution : The correct choice is the third option.

Active voice emphasises the doer of the action, while passive voice emphasises the receiver. To convert passive to active, we make the subject perform the action and rephrase the verb.

The structure of