Staff Selection Commission Combined Higher Secondary Level Exam
Question : Directions: Select the option in which the numbers share the same relationship in the set as that shared by the numbers in the given set. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g.13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.) (6, 12, 24); (28, 14, 7)
Option 1: (32, 14, 1)
Option 2: (36, 16, 9)
Option 3: (25, 18, 16)
Option 4: (25, 10, 4)
Correct Answer: (25, 10, 4)
Solution : Given: (6, 12, 24); (28, 14, 7)
Here, (6, 12, 24)→(12)2 ÷ 6 = 144 ÷ 6 = 24 (28, 14, 7)→(14)2 ÷ 28 = 196 ÷ 28 = 7
Let's check the options – First option: (32, 14, 1)→(14)2
Question : Which of the following processes is used for the production of Biodiesel?
Option 1: Transamination
Option 2: Transcription
Option 3: Transesterification
Option 4: Translation
Correct Answer: Transesterification
Solution : The correct option is - Transesterification
The process of creating biodiesel through the transesterification of chemical reactions is known as biodiesel manufacturing. This involves combining short-chain alcohols (usually methanol or ethanol) with vegetable or animal fats and oils.
Question : Directions: How many triangles are there in the given figure?
Option 1: 8
Option 2: 6
Option 3: 7
Option 4: 5
Correct Answer: 7
Solution : The given figure can be labelled as shown below –
Now, in the above figure, there are 7 triangles. They are ABC, DEF, GHI, JKL, MNO, PQR, STU.
So, there are a total of 7 triangles. Hence, the third option is correct.
Question : Directions: If it was Friday three days ago, then what was the day of the week after 150 days from today?
Option 1: Friday
Option 2: Wednesday
Option 3: Sunday
Option 4: Thursday
Correct Answer: Thursday
Solution : Given: Three days ago was Friday.
If three days ago was Friday, then three days from Friday is today, that is, Monday. Now, we know one week consists of 7 days. Dividing 150 by 7, we get a quotient of 21 and a remainder of
Question : Which is the IUPAC group prefix of Acyl halide compounds?
Option 1: Alkoxy Carbonyl
Option 2: Carbamoyl
Option 3: Cyano
Option 4: Halo Carbonyl
Correct Answer: Halo Carbonyl
Solution : The correct option is Halo Carbonyl.
An acyl halide group is represented with a prefix such as "Fluoro Carbonyl-", "Chloro carbonyl-", "Bromo carbonyl-" or "Iodo carbonyl-" when related to a substituting group or when another group is present that has priority for citation
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. 1, 16, 81, 256, 625, ?
Option 1: 1225
Option 2: 4163
Option 3: 2225
Option 4: 1296
Correct Answer: 1296
Solution : Given: 1, 16, 81, 256, 625,?
Here, (1)4 = 1; (2)4 = 16; (3)4 = 81; (4)4 = 256; (5)4 = 625; (6)4 = 1296
So, the required term will be 1296. Hence, the fourth option is correct.
Question : In a village, 30% of the population is literate. If the total population is 6,600, what is the number of illiterate people?
Option 1: 1980
Option 2: 4620
Option 3: 2200
Option 4: 3280
Correct Answer: 4620
Solution : Given: The literate population is 30%. then the number of illiterate people = 70% of the total population = 70% of 6600 = 4620 Hence, the correct answer is 4620.
Question : Select the INCORRECTLY spelt word.
Option 1: Philosophy
Option 2: Philanthropy
Option 3: Philolegy
Option 4: Philately
Correct Answer: Philolegy
Solution : The correct choice is the third option.
Philolegy is the incorrectly spelt word. The correct term is philology, which is the study of language in written historical sources.
The meanings of the other options are as follows:
Question : A formal language used to express information or knowledge often for use in computer system design is:
Option 1: command language
Option 2: machine language
Option 3: markup language
Option 4: modeling language
Correct Answer: modeling language
Solution : The correct answer is modeling language.
A modelling language is a formal language used to represent information or expertise, typically for computer system design. A modelling language is a language for creating models of real-world systems. Complex systems may be understood, designed, and implemented
Question : If $\frac{x}{y}=\frac{4}{5}$, then the value of $(\frac{4}{7}+\frac{2y–x}{2y+x})$ is:
Option 1: $\frac{3}{7}$
Option 2: $1\frac{1}{7}$
Option 3: $1$
Option 4: $2$
Correct Answer: $1$
Solution : Given: $\frac{x}{y}=\frac{4}{5}$ Divide $y$ in both numerator and denominator of the fraction, $\frac{2y – x}{2y+x}$, we get, $\frac{2–\frac{x}{y}}{2+\frac{x}{y}}$ Substitute the value of $\frac{x}{y}=\frac{4}{5}$ in the above equation, we get, = $\frac{2–\frac{4}{5}}{2+\frac{4}{5}}$ = $\frac{\frac{10–4}{5}}{\frac{10+4}{5}}=\frac{6}{14}=\frac{3}{7}$ The value of the expression $(\frac{4}{7}+\frac{2y–x}{2y+x})$ is given as, $(\frac{4}{7}+\frac{3}{7})=(\frac{4+3}{7})=\frac{7}{7}=1$ Hence, the
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