Staff Selection Commission Combined Higher Secondary Level Exam
Question : What is the IUPAC name of allylamine, which is used to make pharmaceuticals and other chemicals?
Option 1: Propan-1-amine
Option 2: Benzenamine
Option 3: N-Methylethanamine
Option 4: 2-Propen-1-amine
Correct Answer: 2-Propen-1-amine
Solution : The correct option is 2-Propen-1-amine.
It is an important compound used in the synthesis of various pharmaceuticals and chemicals. This name indicates that it is an amine (NH2 group) attached to the second carbon atom of a propane (three-carbon) chain with a double bond.
IUPAC
Question : Directions: In the following question, some parts of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If the sentence is free from error, select 'No Error'.
Just as (1) / I was entering the room, (2) / the family was going for a party. (3) / No Error (4)
Option 1: (1)
Option 2: (2)
Option 3: (3)
Option 4: (4)
Correct Answer: (3)
Solution : The correct choice is the third option.
Explanation: The preposition "for" should be replaced with "to". The prepositional phrase "to a party" conveys that the family was going to attend a party or an event.
Therefore, the correct sentence is: "Just as I
Question : What will be the greatest number $32 \mathrm{a} 78\mathrm{b}$, which is divisible by 3 but NOT divisible by 9? (Where a and b are single digit numbers).
Option 1: 329787
Option 2: 329784
Option 3: 329781
Option 4: None of these
Correct Answer: 329784
Solution : For option 1, the sum of the digits = $3 + 2 + 9 + 7 + 8 + 7 = 36$ (Divisible by 3 and 9) For option 2, the sum of the digits = $3 + 2 + 9 + 7 + 8
Question : The total surface area of a right circular cylinder with a radius of the base 7 cm and height 20 cm, is:
Option 1: 900 cm2
Option 2: 140 cm2
Option 3: 1000 cm2
Option 4: 1188 cm2
Correct Answer: 1188 cm2
Solution : Given: Radius, $r$ = 7 cm Height, $h$ = 20 cm we know that, Total surface area of right circular cylinder = $2\pi r(h+r)$ = $2 × \frac{22}{7}×7(20+7)$ = 2 × 22 × 27 = 1188 Hence, the correct answer is 1188 cm
Question : Prime Minister Narendra Modi inaugurated the United Nations World Geospatial Congress (UNWGC) 2022 held in ______.
Option 1: Bangalore
Option 2: Mumbai
Option 3: Hyderabad
Option 4: Pune
Correct Answer: Hyderabad
Solution : The correct option is Hyderabad.
It is the second edition of the United Nations World Geospatial Congress (UNWGC), which is hosted in Hyderabad. The host for the congress changes every four years. China is the country that hosted the inaugural year in 2018. The theme
Question : Select the most appropriate ANTONYM of the underlined word in the given sentence.
One needs to be free of prejudices while dealing with judicial cases.
Option 1: Favours
Option 2: Discriminations
Option 3: Bigotries
Option 4: Equalities
Correct Answer: Equalities
Solution : The correct choice is the fourth option.
The term prejudices implies a biased or unfair attitude towards a particular group or individual. Equalities represent the opposite, suggesting fairness, impartiality, and the absence of prejudice, making it the suitable antonym in the given context.
The meanings
Question : Directions: In this question, a part of the sentence is in bold. Below are given alternatives to the bold part at (1), (2), and (3) which may improve the sentence. Choose the correct alternative. In case no improvement is needed your answer is (4).
I want you to clearly understand that excuses will not do.
(1) you clearly to understand
(2) to clearly understand you
(3) you to understand clearly
(4) No Improvement
Solution : The sentence can be improved using the third option.
The phrase "clearly understand" should be replaced with "understand clearly" as the adverbs should be used in such a way that they modify the verb. Here, the latter is a better phrasing because we want to
Question : Directions: The position of how many letters will remain unchanged if each of the letters in the word DEFORM is arranged alphabetically.
Option 1: Two
Option 2: Four
Option 3: Three
Option 4: One
Correct Answer: Three
Solution : Given: DEFORM
On arranging the letters of the word DEFORM in alphabetical order, the new letter cluster formed is DEFMOR. Now, the position of the letters that remain unchanged in the new letter cluster formed is as follows –
From the above, only the position
Question : Directions: In the following question, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. BCZYDEXWFGVUH?
Option 1: Q
Option 2: S
Option 3: J
Option 4: I
Correct Answer: I
Solution : Given: BCZYDEXWFGVUH?
Divide the series→BC / ZY / DE / XW / FG / VU / H? Here, every alternate part starting from the first is written in increasing order – BC→B + 1 = C; C + 1 = D DE→D + 1 =
Question : Vinay sells an article at a profit of 20%. If both the cost price and selling price are reduced by Rs. 20, then the profit becomes 40%. What is the initial cost price?
Option 1: Rs. 80
Option 2: Rs. 60
Option 3: Rs. 50
Option 4: Rs. 40
Correct Answer: Rs. 40
Solution : Let the initial cost price = $100x$ A profit of 20% means the selling price = $120x$ As both were reduced by Rs. 20. New cost price = $100x - 20$ New selling price = $120x - 20$ Profit = $(120x - 20 -
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