Explore topic-wise InterviewSolutions in Current Affairs.

The average velocity of a body is defined as the ratio of its total displacement to the total time.

The answer is (b) It regulates growth and development of the body

Insulin is the hormone which is secreted by pancreas and regulates the sugar level of blood and its deficiency lead to diabetes. It has nothing to do with the growth and development.

Therefore, (b) is incorrect statement about insulin.

Rate of change of velocity of a body is called acceleration.

A graph drawn by taking time along the x-axis and displacement along the y-axis is called position-time graph.

If the velocity of a body changes by an equal amount in equal interval of time, however, small the interval maybe then its acceleration is said to be uniform.

Correct answer is (B) 3.4 Å

Correct Answer is: (A) Gamma radiation 

Gamma radiation is the most preferred physical mutagen by plant breeders. Combinational use of in vitro tissue culture and mutation breeding methods makes a significant contribution to improve new crops. 

Large populations and the target mutations can be easily screened and identified by new methods.

Correct Answer is: (B) 3.4 Å 

The distance between consecutive two nucleotides of B-DNA is 3.4 Å

The correct option is C) 100 Hz.

If we consider this, the output frequency is certainly twice than that of input frequency. So, if the input frequency is 50 Hz, output frequency will be 100 Hz.

Correct answer is (C) three

Correct Answer is: (C) three 

The ABO blood group antigens are encoded by one genetic locus, the ABO locus, which has three alternative (allelic) forms—A, B, and O. 

A child receives one of the three alleles from each parent, giving rise to six possible genotypes and four possible blood types (phenotypes).

The correct option is C) (Over line) A. B = Y.

The Boolean expression for a logic NAND gate is denoted by a single dot or full stop symbol, ( . ) with a line or Over line, ( ‾‾ ) over the expression to signify the NOT or logical negation of the NAND gate giving us the Boolean expression of: A.B = Y.

Correct Answer is: A) Multiple allele 

Presence of more than two alleles for a gene is called Multiple alleles. These are present on the same locus of homologous chromosomes.

Noble gases are monoatomic in nature. It is because noble gases make oxidation.

The anomalous properties of fluorine are as follows :

• Fluorine has the highest reactivity among other halogens. 
• Fluorine forms strong hydrogen bonding in its hydrides unlike other halogens. 
• HF is a liquid while other hydrogen halides are gases at room temperature. 
• HF is a weak acid while other haloacids are strong acids. 
• Fluorine shows only one oxidation state – 1 while all other halogens show variable oxidation states like -1, +1, +3, +5 and + 7. 
• Fluorine has the highest electronegativity but less negative electron gain enthalpy than chlorine. 
• The compounds of fluorine have higher ionic character than other halogens. 
• Fluorine has no tendency to form polyhalide ion whereas other halogens form polyhalide ions like, Cl₃^-, Br₃^-  and I₃^-.
• Fluorine unlike other halogens when reacts with water and produces O₂ and O₃. 2F₂ + 2H₂O → 4HF + O2 ; 3F₂ + 3H₂O → 6HF + O₃
• Fluorine shows much higher values of ionisation enthalpy, electronegativity and standard electrode potentials compared to the other halogens. 
• Fluorine shows much lower values of ionic and covalent radii, melting and boiling points and electron gain enthalpy than expected.
• Fluorine forms only one oxoacid HOF, while the other halogens form a number of oxoacids.

Oxygen is the first element of group 16. 

Reasons for anomalous behaviour of oxygen :

• It has the smallest size in the group. 
• It has the highest electronegativity (3.5). 
• It does not have vacant d-orbitals like other elements in group 16. 

Out of PH₃ and H₂S, H₂S is more acidic because acidic character increases on moving across the period.

(A) Tuberculosis

(B) Take boiled water

We know that, 

Volume of a cuboid = Length × Breadth × Height 

42000 L = 42 m³ (As 1 m³ = 1000 L) 

Therefore, 

Height (h) = \(\frac{Volume}{Ib}\)

= \(\frac{42}{6\times3.5}\)

= 2 m 

Hence, option A is correct

Answer is (A) 30°

Answer is (B) 18°

Answer is (C) 16°

Answer is (C) 8

Answer is (C) 118°

Money earned by seema = Rs 1,50,000

Money Saved by Seemed = Rs 50,000

Money spent = Rs 1,50,000 – Rs 50,000 = Rs 1,00,000

(a) Ratio of money earned to money saved = 1, 50,000/50,000 

= 3/1 = 3 : 1

(b) Ratio of money saved to money spent = 50,000/1,00,000 

= 1/2 = 1 : 2

9 – [(4 – 3) + 2 x 5] 

= 9 – [1 + 10] 

= 9 – 11 

= -2

[(4 x 2) – (4 – 2)] + 8 

= 8 – 2 + 8 

= 16 – 2 

= 14

28 – (3 x 8) – 6 

= 28 – 24 – 6 

= 28 – 4 

= 24

[18 -(15 -5) + 6] 

= [18 – 3 + 6] 

= [18 + 3] 

= 21

Cellulose: The source material obtained from wood pulp is called cellulose.

an insoluble substance which is the main constituent of plant cell walls and of vegetable fibres such as cotton. It is a polysaccharide consisting of chains of glucose monomers.

60 – {16 + (4 x 6 – 8)}

= 60 – {16 + (24 – 8)}

= 60 – {16 + 16}

= 60 – 1 

= 59

22 – [3 – {8 – (4 + 6)}]

= 22 – [3 – {8 – 10}]

= 22 – [3 + 2]

= 22 – 5 

= 17

25 – [12 – {5 + 18 + ( 4 – 5 – 3)}]

= 25 – [12 – {5 + 18 + (4 – 2)}]

= 25 – [12 – {5 + 18 + 2}]

= 25 – [12 – {5 + 9}]

= 25 – [12 – 14]

= 25 – [-2]

= 25 + 2 

= 27

= 34 – [29 – {30 + 66 + (24 – 2)}]

= 34 – [29 – {30 + 66 + 22}]

= 34 – [29 – {30 + 3}]

= 34 – [29 – 33]

= 34 – [-4]

= 34 + 4 

= 38

Step 1:

Rewrite the given equation as it is

KCN + H₂SO₄ → K₂SO₄ + HCN

Step 2:

Write the number of atoms of each element or group in the unbalanced equation on both sides of the equation.

The number of oxygen atoms involved in different compounds on both sides (reactants and products) are equal. Therefore, balance the number of atoms of the second element, potassium.

Step 3:

To balance K atoms:

To equalise the number of potassium atoms, we use 2 as the coefficient of KCN in the reactants. 

Now, the partly balanced equation becomes 

2KCN + H₂SO₄ → K₂SO₄ + 2HCN

Now, count the atoms of each element on both sides of the equation. The number of atoms on both sides are equal. Hence, the balanced equation is

2KCN + H₂SO₄ → KgSO₄ + 2HCN

Now indicate the physical states of the reactants and the products.

2KCN_(aq) + H₂SO_4(aq) → K₂SO_4(aq) + 2HCN_(g)

2KCN + H₂SO₄ → K₂SO4 + 2HCN

Correct option is: (b) H₂ + Cl₂ → 2HCl

CORRECT OPTION :

b) H₂ + Cl₂ → 2HCl

REASON :

a) Is a displacement reaction.

c) Is a thermal decomposition reaction

d) Is also a thermal decomposition reaction.

Hence, option (a) is the correct answer.

Correct option is (D) 1000p + 100q + 10r + s

Thousands digit in pqrs is p,

Hundreds digit in pqrs is q,

tens digit in pqrs is r and

unit digit in pqrs is s.

\(\therefore\) pqrs = 1000p+100q+10r+s

D) 1000p + 100q + 10r + s

15 – [16 – {12 + 21 ÷ (9 – 2)}]

= 15 – [16 – {12 + 21 ÷ 7}]

= 15 – [16 – {12 + 3}]

= 15 – [16 – 15]

= 15 – 1 

= 14

(i) On dividing 9 by 7, quotient = 1 and remainder = 3

(ii) On dividing 18 by 6, quotient = 3 and remainder = 0

(iii) Factor of a number is an exact division of the number

(iv) Every number is a factor of itself

(v) Every number is a multiple of itself

(vi) One is factor of every number.

(vii) For every number, its factors are finite and its multiples are infinite

(viii) x is a factor of y, then y is a multiple of x.

Correct option is  A) 7

Correct option is (A) 108

(A) Sum of digits in, 108 = 1+0+8 = 9 is divisible by 9.

\(\therefore\) 108 is divisible by 9.

(B) Sum of digits in, 111 = 1+1+1 = 3 is not divisible by 9.

(C) Sum of digits in, 112 = 1+1+2 = 4 is not divisible by 9.

(D) Sum of digits in, 110 = 1+1+0 = 2 is not divisible by 9.

Thus, 111, 112 and 110 are not divisible by 9.

Correct option is  A) 108

Correct option is (C) 1

1 – 1 + 1 – 1 + … 9 times

= (1-1) + (1-1) + (1-1) + (1-1) + 1

= 1

Correct option is  C) 1

Correct option is (D) 10

1 + 1 + 1 + … + 1 (10 times)

= 10 \(\times\) 1 = 10

Correct option is  D) 10

Correct option is  D) 4

Correct option is  D) 1

Correct option is  A) 2