Explore topic-wise InterviewSolutions in Current Affairs.

1. Its atomic number is 11 

2. It is s-block element. 

3. It is in 3^rd period.

4. It is in 1^st group.

5. Its valency is 1.

6. Number of valence electrons is 1.

7. It can form uni positive ion.

8. It can form ionic bond.

9. It is a metal.

1. A wire with high resistance is connected in the house hold circuit such that the entire current from the mains must pass through this wire called fuse. 

2. It has low melting point. 

3. When the current exceeds certain limit the fuse wire heats up and melts. Then the circuit becomes open. Thus preventing all electrical appliances from damage due to over load. 

4. It is available in low cost and protects all electrical appliances from damage due to over load. Hence the role of fuse wire is highly appreciable.

1. The suitable method to extract these metals from their chlorides is electrolysis of their fused compounds. 

2. Reduction and electrolysis of their aqueous solutions are not feasible

The correct answer is 1972.

• C.P.R. Environmental Education Centre (CPREEC) is established jointly by the Ministry of Environment, Forest & Climate Change, Government of India, and The C.P. Ramaswami Aiyar Foundation.
• The year 1972 marked a watershed in the environmental conservation movement in India. On the eve of the United Nations Conference on Human Environment in 1972, popularly called the Stockholm Conference, the Pitamber Committee was set up to make a report on the state of the environment in India.
• Based on its recommendations, a National Committee on Environmental Planning and Coordination (NCEPC) was constituted by the Government of India in the Department of Science and Technology in order to plan and coordinate environmental programs and policies and advise various ministries on environmental protection.
• Later, this department was elevated to form an exclusive Ministry of Environment and Forests in 1985.

• The major environment acts of India are as follows-
  • The Water (Prevention and Control of Pollution) Act, 1974
  • The Water (Prevention and Control of Pollution) Cess Act 1977
  • The Air (Prevention and Control of Pollution) Act, 1981
  • The Environment (Protection) Act, 1986
  • The Public Liability Insurance Act, 1991
  • The National Environment Tribunal Act, 1995
  • The National Environmental Appellate Authority Act, 1997

(i) Pauli's Exclusion Principle states that "No two electrons of the same atom can have all four quantum numbers the same". 

(ii) The major consequence of the exclusion principle involves orbital occupancy. 

An orbital can hold only two electrons and they must have opposite spins.

(c) accepted

Quantity A:

C and D fill a tank in 45 minutes and 30 minutes.

Total capacity of the tank(L.C.M of 45 & 30) = 90 units

Tank filled by the pipe C in 1 minute = 90/45 ⇒ 2 units

Tank filled by the pipe D in 1 minute = 90/30 ⇒ 3 units

Tank filled by C and D in 1 minute = 5 units

5 units are filled in 1 minute.

∴ 90 units are filled in 18 minutes i.e (90/5)

Time taken by pipes to fill a tank is 18 minutes.

Quantity B:

18 minutes

∴ Quantity A = Quantity B

Quantity A:

Maximum marks = Passing marks / Passing percentage × 100

Passing marks = 150 + 30 = 180

Let the maximum marks be x

According to the Question

40% of x = 180

x = 180/40 × 100 = 450

Quantity B:

500

∴ Quantity A < Quantity B

Quantity A:

Percentage of green pens = (100 – 10 – 20)%

= 70 %

Number of green pens = 70 % of 50

= (70/100) × 50

= 35

Quantity B:

35

∴ Quantity A = Quantity B

Quantity A:

Amount = P(1 + r/100)t

Amount = 13,200(1 + 10/100)²

⇒ Amount = 13200 × 11/10 × 11/10 = 15,972

⇒ Compound interest = 15972 – 13200 = 2772

∴ Compound interest = Rs.2772

Quantity B:

Rs.3000

∴ Quantity A < Quantity B

(b) Graphomania

Quantity A:

Amount = P(1 + r/100)^t

let the principal amount be x.

⇒ 8x = x(1 + r/100)³

⇒8x/x = (1 + r/100)³

⇒8 = (1 + r/100)³

⇒ (2)³ = (1 + r/100)³

⇒2 = (1 + r/100)

⇒1 = r/100

R = 100%

Quantity B:

10%

∴ Quantity A > Quantity B

Correct Answer is : (c) disliked

Someone who makes animated films with a series of drawings on paper or on the computer is called animator.

Correct Answer is : (b) dis

(c) Fellowship Trinity College of London

Correct Answer is : (c) ignore

Quantity A:

Speed of the swimmer along the stream,

S_d = 4 + 1 = 5 km/hr

Speed of the swimmer against the stream,

S_u = 4 - 1 = 3 km/hr

Time taken by the swimmer = 6/5 + 6/3

= 1.2 + 2

= 3.2 hours

Quantity B:

2 hours

∴ Quantity A > Quantity B

Quantity A:

Suppose dealer’s cost price is Rs. 1000 for 1000 gram good.

As, he is using 30% less weight,

⇒ Actual quantity sold = 1000 – 30% of 1000 = 700 gm

⇒ Actual Cost price = Rs. 700

Also, he promises to sell his goods at 44% loss,

⇒ Actual selling price = 1000 – 44% of 1000 = 1000 × 0.56 = Rs. 560

⇒ Actual loss = {(700 – 560)/700} × 100 = 20%

Quantity B:

22%

∴ Quantity A < Quantity B

(b) dauntless

Correct Answer is : (a) sur

(d) Drug Abuse Resistance Education

Quantity A:

Total number of balls = 10 + 10 + 5 = 25

Required probability = probability of picking first ball red × probability of picking second ball purple

Required probability = (10/25) × (10/25) = 4/25

⇒ Required probability = 0.16

Quantity B:

0.06

∴ Quantity A > Quantity B

'Badhaai Ho' wins the Best Popular Film Providing Wholesome Entertainment at National Film Awards.

Badhaai Ho just didn't touch upon but went deep into a subject, none of the Bollywood movies has gone before. The director deals with the theme with finesse, putting in measured doses of comedy and drama to make it a truly mass entertainer for the Indian audience. Movies with such content depend highly on the acting and direction part to get them going, and this one just didn't pull through but brought the house down in laughter as well as gave lumpy throats in various scenes. It is hard to pinpoint any one performance at the cost of being unfair to others, but Gajraj Rao's (the father) mute expressions and initial unease while disclosing the news to his family and the discomfort while peers congratulating him, do show semblances with one Rowan Atkinson of Mr Bean fame; deliberate or not, it surely entertains. Surekha Sikri, whenever appears, the audience is already half smiling apprehending another good laugh, and Neena Gupta is as good as she has ever been acting-wise. Sheeba Chaddha as the girl's mother was perfectly cast and Sanya Malhotra, known as the Dangal younger sister, did well in whatever part she got and looked lovely with that hairstyle. Ayushmann's Delhi accent was too good for a Bong like me to pick, his back-to-back hits now following Andhadhun surely puts him at the top now. The director too smartly outwits the audience with the two sequences following the rehearsing scene in front of the mirror. The film also brings back memories of the Hrishikesh Mukherjee, Basu Chatterjee movies of late 70s and early 80s, which had a similar dramedy flavour to them. Overall, an assured good time watching it, with a positive social message too.

Under a build-operate-transfer (BOT) contract, an entity—usually a government—grants a concession to a private company to finance, build and operate a project for a period of 20-30 years, hoping to earn a profit. After that period, the project is returned to the public entity that originally granted the concession.

Given:

Length of train = 500 m

Length of platform = 1000 m 

Time taken to cross a platform = 5 min

Formula :

Distance = Speed × Time

The relative speed of two bodies with speed x m/sec and y m/sec, traveling in the same direction is (x – y) m/sec, where x > y.

Calculation:

Quantity I:

(500 + 1000) = speed of train × 300

⇒ 1500 = speed of train × 300 

⇒ speed of train = 5 m/s

Quantity II:

15 minutes = 15 × 60 = 900 sec

Let the speed of the bicycle = x m/sec

Relative speed = (x – 5) m/sec

Distance = Relative speed × Time

500 = 900 × (x – 5) 

⇒ 5/9 = x – 5

⇒ x = 5 + 5/9

⇒ x = 50/9 m/sec

⇒ Speed of bicycle = 50/9 m/sec

∴ Quantity I < Quantity II

Given∶

Number of taps = 8

Time = 80

Formula used∶

M₁ T₁ = M₂ T₂

Where M and T represents number of taps and time.

Calculation∶

8 × 80 = M₂ × 64

⇒ M₂ = (8 × 80)/64

⇒ M₂ = 10

Given:

Distance between the two cities = 500 km

Calculation:

For statement I:

It is not given whether both start simultaneously or not.

Also, no time is given which we can use as a reference for finding the meeting point.

∴ Statement I alone is not sufficient.

For statement II:

Timing is calculated from difference

Rimpy = > 5am - 3 pm = 10 hrs

Dimpy = > 7pm - 7am = 12 hrs

Rimpy and Dimpy take 10 hours and 12 hours respectively to cover Ahmedabad and Bhopal.

Let Distance be D. (Lcm of 10 and 12 = 60 km)

⇒ Rimpy’s speed = 60/10 = 6 km / h

⇒ Dimpy’s speed = 60/12 = 5 km / h

By, 7:00 am Rimpy would have covered 5 × 2 = 10 km

∴ The time when both will meet.

⇒ Remaining Distance / Relative speed

⇒ (60 -  10) / (6 + 5)

⇒ (50) / (11)

⇒ 4.36 hrs

Given:

Number of taps = 6

Time = 126

Formula used:

M₁ T₁ = M₂ T₂

Where M and T represents the number of taps and time.

Calculation:

6 × 126 = M₂ × 42

⇒ M₂ = (6 × 126)/42

⇒ M₂ = 18

∴ 18 taps are required to fill a container in 42 minutes.

As the value of time is (1/3)^rd of initial value or decreased by 200%, then the number of taps must also increase by 200% of the initial value 

Calculation:

For statement I:

The cost price of the mixture is less than = 12 / 120 × 100

⇒ Rs. 10 per kg.

The quantities of cheaper to dearer could be 1 : 4 or 4 : 1.

Case 1:

Consider 1 : 4

So, x kg of the cheaper is mixed with 4x kg of the dearer.

Let the cost of the dearer variety be Rs. K per kg.

Then, (14x + 4kx) / (x + 4x) < 10

⇒ 4k + 14 < 50

⇒ 4k < 36

⇒ k < 9

Case 2:

Consider 4 : 1

So, 4x kg of the cheaper is mixed with x kg of the dearer.

Then, (kx + 56x) / (x + 4x) < 10

⇒ k + 56 < 50

⇒ k = -6

So, in either case the dearer variety costs less than Rs. 20 per kg.

∴ Statement I alone is sufficient.

Let the cost of the cheaper variety be Rs. Y and dearer variety be Rs. Z per kg.

Let the quantities of the cheaper and dearer varieties be x and 4x respectively

⇒ Given, (yx + 4zx) / 5x < 10

⇒ y + 4z < 50

Since, y > 0

⇒ 4z < 50

⇒ z < 12.5

So, the dearer variety costs less than Rs. 20 per kg.

Calculation:

For statement I:

The increase in profits was the same from the year 2017 to 2018 as from the year 2017 to 2019. This statement is tricky. At the first moment after watching, it appears insufficient but a careful analysis shows that this information proves that there was no change could be the same from the year 2017 to the year 2018 as from the year 2017 to year the 2019 is with a zero percentage change from the year 2018 to 2019.

∴ Statement I alone is sufficient.

The profits in the year 2017 were Rs. 20,000 crore and in the year 2019 were Rs. 21000 crore. 

So, the increase in profits from the year 2017 to 2019 = (21000 - 20000) = 1000 crore.

We can calculate the percentage gain from the year 2017 to year 2019. 

But it is not possible to know how much of this increase occurred between the years 2018 to 2019 as profit data for the year 2018 is not given. 

∴ Statement II alone is not sufficient. 

Given:

(1/4)th of the tank fills in 3 hours

Calculation:

Remaining portion of a tank = 1 – (1/4)

= 3/4

(1/4)th of a tank = 3 hours

Full container fill = 3 × 4

⇒ 12 hours

(3/4)th tank fills = 12 × (3/4)

⇒ 9 hours

Both the grasshopper and the cricket are the representative voices of nature’s music or poetry. Both offer a soothing effect the extremities of climate. The grasshopper’s song balances the extreme heat during the summer by providing music that is comforting and pleasing. The cricket does the same during winter.

Right hand thumb rule: 

It states that if thumb of the right-hand points along direction of current, then the remaining curled fingers of same hand gives the direction of the magnetic field due to the current. 

⇒Applying right hand thumb rule, we get that the direction of the magnetic field at a point below the wire is from north to south. The direction of the magnetic field at a point directly above the wire is from south to north.

The Fleming’s left-hand rule gives the direction of force experienced by current carrying conductor placed in an external magnetic field. 

Fleming’s left hand rule: 

When an electric current passes through a straight wire, an external magnetic field is applied across that flow, the wire experiences a force perpendicular to both, the field and to the direction of the current flow. It states that, if a left hand is held, so that thumb, first finger and second finger are held mutually perpendicular to each other. The thumb represents the direction of motion resulting from the force on the conductor. The first finger represents the direction of the magnetic field. Then, the second finger represents the direction of the current.

(a) Contraceptive methods are used such as (i) mechanical (ii) drugs (as pills) (iii) loop or copper T and (iv) surgical method.
(b) Pills change the hormonal balance and thus prevent the release of egg, hence fertilisation is prevented.

14/A Lal Darwaza
Kota
February 22, 2020
The Claims Superintendent
West-Central Railway
Jabalpur

Dear Sir,

We received six cases containing crockery despatched to us by Bawa Glass Factory, Delhi on February 15, 20– against R/R No. 720307. One of the six cases was broken and the contents were found to have been severely damaged. The invoice value of this case is 1500/- (One thousand five hundred only). We are enclosing the invoice in the original. We hope that our claim will be admitted and an early payment will be arranged to oblige us.
Hoping to hear favourably from you soon.

Yours faithfully
For Rana Crockery
Ram Mohan
(Manager)

Physisorption has lower enthalapy.

Solid – solid solution.

The base present only in DNA but not in RNA is Thymine.

Correct answer is (b) Raoult’s law 

For any solution, the partial vapour pressure of each volatile component in the solution is directly proportional to its mole fraction.

p ∝ x

p = p° x

where p = partial vapour pressure,

 p° = Vapour pressure of pure component.

 x = mole fraction

Answer is (b) Raoult’s law

Answer is (c) metal deficiency defect (anion is missing from lattice site)

In Frenkel defect the smaller ion occupies the interstitial sites and Schottky defect equal number of cations and anions are missing. Interstitial defect an atom or molecule occupies intestinal sites so in these three defects the ratio of positive and negative ions (Stoichiometric) of a solid is not disturbed in these three

Correct answer is  (b) 3, 1,-1, +\(\frac {1}{2}\)

3p_x electron; n = 3 (main shell) 

for p_x orbital, l = 1, m = -1, s = \(\frac {1}{2}\)

Answer is (d) N-N is weaker than P-P

other statements as incorrect as Phosphorus has a higher melting point due to bigger size than Nitrogen. Nitrogen is inert due to formation of triple bonds and has a lower covalence due to non - availability of d – orbitals

(d) Removal of electron from orbitals bearing lower n value is easier than from orbital having high n value.

Answer: magnesium

The answer is LiAlH₄.

Monomer of Nylon 6, 6 – Hexamethylene diamine and Adipic acid. 

Partial structure – [-OC-(CH₂)₄-CONH-(CH₂)₆ – NH-]_n

R – X + 2Na + X – R → R – R + 2NaX