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Identify the function of the following: The trachea and bronchi are provided with C-shaped cartilaginous rings which (A) Give support to lungs. (B) Divide trachea and bronchi. (C) Are responsible for sound production. (D) Give them support and prevent their collapse.

The correct answer is (D) Give Them Support And Prevent Their Collapse. The cartilage ring is C-shaped because the trachea presses against the... View Article

Which of the following best describes an array_______.(A) Array is not a data structure. (B) Arrays are immutable once initialised. (C) Container of objects of similar types. (D) A data structure that shows a hierarchical behavior.

The correct answer is (C) Container Of Objects Of Similar Types. Explore more such questions and answers at BYJU’S.... View Article

A metal m readily forms its sulphate mso4 which is water soluble. it forms its oxide mo which becomes inert on heating. it forms an insoluble hydroxide m(oh)2 which is soluble in NaOH solution. then m is :(a) Ba.(b) be.(c) Ca.(d) Mg.

The correct answer is (B) Be. The metal M is Be. The solubility of alkaline earth metal decreases as we move down in the periodic table. The... View Article

Starting from rest ,a body slides down a 45° inclined plane in twice the time takes to slide down the same distance in the absence of friction .The coefficient of friction between the body and inclined plane is

Sol: Case: 1 When there is no friction: From newton's second law, Force = mass * acceleration. As the body starts from rest, the... View Article

The Anomalous Behaviour Of Nitrogen Is Due To______. (A) Ease Of Multiple Bond Formation. (B) Small Size And High Electronegativity. (C) Non-availability Of D-orbitals In The Valence Shell. (D) All Of These.

The correct answer is (D) All Of These. Nitrogen (N), being small in size, highly electronegative, has a high ionization energy and... View Article

Sangers Reagent Is Used For The Identification Of :(A) Side Chain Of Amino Acids. (B) N-terminal Of The Peptide Chain.(C) C-terminal Of The Peptide Chain.(D) Molecular Weight Of The Peptide Chain

The correct answer is (B) N-terminal Of The Peptide Chain. Explore more such questions and answers at BYJU’S.... View Article

If resistivity of pure silicon is 3000 Ω m and the electron and hole mobilities are 0.12 m²v⁻¹s⁻¹ and 0.045 m²v⁻¹s⁻¹ respectively, determine. The resistivity of a specimen of the material when 10¹⁹ atoms of phosphorous are added per m³ Given e= 1.6 × 10⁻¹⁹ c, p=3000 Ω m, μe = 0.12m²v⁻¹s⁻¹ , μh = 0.045m²v⁻¹s⁻¹

Sol: The resistivity of pure silicon (Si) is given by When , the semiconductor becomes an n-type semiconductor. Therefore,... View Article

Give two uses of diamond

The two uses of diamond are as follows: 1. They are used in jewellery (such as earrings, nose rings, engagement rings, pendants, etc.) due to... View Article

12 men and 16 boys can do a piece of work in 5 days 13 men and 24 boys can do it in 4 days. The ratio of the daily work done by a man to that of a boy is (A) 2:1 (B) 3:1 (C) 3:2 (D) 5:4

Let us assume Boy finish the work in x days and man finish the work in y days So, One day work of a boy = 1/x and one day work of a man = 1/y One... View Article

Tripitaka texts are related with which religion? (A) Vedic (B) Buddhism (C) Jainism (D) Shaivism

Buddhism The most important sources of Buddhism are the Tripitakas. Tipitaka texts are written in the Pali language. They are: 1. Sutta Pitaka... View Article

The holy place of Varanasi is situated on the bank of river _______ (A) Brahmaputra (B) Ganga (C) Kasi (D) Gundaki

The holy place of Varanasi is situated on the bank of river Ganga. Hence, the correct option is (B)... View Article

The ratio of the angular speeds of the hour hand the minute hand of a clock is (A) 12:1 (B) 1:6 (C) 1:8 (D) None of these

The hour hand of a clock covers 30 degrees in 60 minutes Hence, Angular speed of hour hand, wh = 30/60 On simplification, we get, wh = 0.5... View Article

In cockroach the excretory product is (A) Ammonia (B) Uric acid (C) Urea (D) Both A and C

Uric acid The metabolic waste is excreted by ciliated and glandular Malpighian tubules. The waste is excreted in the form of uric acid. Hence,... View Article

Find location of Mussoorie, Nainital, Ranikhet from your atlas and also name the state where they are located

All the hill stations are located in the state of Uttarakhand in the range called lesser Himalaya or Himachal. Students are advised to locate... View Article

If x +1/x = 4, then x^4+1/x^4 is equal to (A) 196 (B) 194 (C) 192 (D) 190

Given x + 1/x = 4 Squaring on both sides, we get, x2 + 1/x2 + 2 = 16 x2 + 1/x2 = 16 - 2 x2 + 1/x2 = 14 Again, squaring on both sides, we... View Article

Sagar and Aakash ran 2 km race twice. Aakash completed the first round 2 minutes earlier than Sagar. In the second round Sagar increased his speed by 2 km/hr and Aakash reduced his speed by 2 km/hr. Sagar finished 2 minutes earlier than Aakash. Find their speeds of running in the first round.

Let the speed of Sagar be considered as x km/hr. And speed of Aakash be y km/hr. Hence, time taken by Sagar = 2/x hrs. And time taken by Aakash =... View Article

A ball of mass 1kg dropped from 9.8m height strikes the ground and rebounds to a height of 4.9m. If the time of contact between ball and ground is 0.1s, then find impulse and average force acting on ball.

v2 = u2 + 2gh v2 = 0 + 2 x 9.8 x 9.8 v = √(2 x 9.8 x 9.8) We get, v = 9.8 √2 Again, v2 = u2 - 2gh 0 = u2 - 2 x 9.8 x 4.9 u2 = 96.04 u... View Article

Delhi first became the capital of a kingdom under the ___________. (A) Khaljis (B) Turkish Rulers (C) Chauhans (D) Tomara Rajputs

Tomara Rajputs Delhi was the capital of a kingdom under the Tomara Rajputs who were defeated in the middle of the 12th century by the Chauhans... View Article

The carnot cycle has maximum efficiency (A) Reversible engine (B) Irreversible engine (C) Petrol engine (D) Diesel engine

Reversible engine As per the Carnot theorem, the reversible engine will always have a greater efficiency than the irreversible one. Hence, the... View Article

Find the area of each of the following triangles

(a) (b) (c) (d) (a) From the figure, Base of triangle = 4 cm Height of height = 3 cm Then, Area of triangle = ½ × base ×... View Article

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