In triangle PQR, right angled at Q, PR + QR = 25 cm and PQ = 5 cm. Find all the sides.
Given PQ = 5 cm PR + QR = 25 cm Now, let us assume, QR = x PR =... View Article
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What characteristic property of light is responsible for the blue colour of the sky? (A) Interference (B) Diffraction (C) Scattering (D) Dispersion
Scattering The sunlight that reaches the earth’s atmosphere is scattered in all directions by the gases and dust particles present... View Article
Addition of pentavalent impurity to a semiconductor creates many (A) Free electron (B) Holes (C) Valence electrons (D) Bound electrons
Addition of pentavalent impurity to a semiconductor creates many ‘free electron’. Hence, the correct option is (A)
1 mega ohm is equal to (a) 10^3Ω (b) 10Ω (c) (1/1005) Ω (d) 10^6Ω
1 mega ohm = 106 Ω Hence, the correct answer is option (D)
What is the difference between an alkali and a base?
Alkali 1. Bases that dissolve in water are alkali 2. All alkali are bases 3. It releases OH-ions, accepts a... View Article
The following configuration of gate equivalent to: (A) NAND (B) XOR (C) OR (D) None of these
The figure in the question is shown below The given output equation can be written as \(\begin{array}{l}Y = (A+B).(\bar{A}+\bar{B}) {De... View Article
A person on tour has Rs 360 for his expenses. If he extends his tour for 4 days, he has to cut down his daily expenses by Rs 3. Find the original duration of the tour.
Let x days be the original duration of the tour Total expenditure on tour = Rs 360 Expenditure per day... View Article
Bipolar neurons occur in A. Vertebrate embryos B. Retina of eyes C. Brain and spinal cord D. Skeletal muscles
Answer: B. Retina of eyes Bipolar neurons are found in the retina of the eye, inner ear and roof of... View Article
3, 10, 20, 33, 49, 68, ___
3, 10, 20, 33, 49, 68, 90 3 + 7 = 10 10 + 10 (+3) = 20 20 +... View Article
Which reaction is not feasible? A. 2KI+Br2⟶2KBr+I2 B. 2KBr+I2⟶2KI+Br2 C. 2KBr+Cl2⟶2KCl+Br2 D. 2H2O+2F2⟶4HF+O2
Answer: B. 2KBr+I2⟶2KI+Br2 2KBr+I2⟶2KI+Br2 is not feasible.
Proteins are the polymers of __________. A. Formaldehydes B. Secondary amines C. Amino acids D. Ammonia
Answer: C. Amino acids Proteins are the polymers of amino acids.
Who was the founder of the Gurjara Pratihara dynasty? A. Harichandra B. Raja Bhoj C. Prithviraj Chauhan D. Pulakeshin
Answer: A. Harichandra Harichandra was the founder of the Gurjara Pratihara dynasty.
The value of: (3 + cot 76°.cot16°)/(cot 76° + cot 16°) is:
The value of (3 + cot 76°.cot16°)/(cot 76° + cot 16°) is tan 46°. Explanation: \(\begin{array}{l}\begin{array}{l} \frac{3+\cot 76^{\circ} \cot 16^{\circ}}{\cot... View Article
Who was chunilal what did he want from bepin babu?
Chunilal was Bepin Babu’s school mate. He had been having a rough time lately and had been coming to see... View Article
(i) What is meant by the term ‘coordination number’? (ii) What is the coordination number of atoms: (a) in a cubic close-packed structure? (b) in a body-centred cubic structure?
(i) Coordination number of an atom/ion/molecule is the number of nearest atom/ion/molecule of immediate neighbour of given atom. In ionic crystals,... View Article
Amniocentesis is a process to: A. determine any disease of heart B. determine any hereditary disease of the embryo C. know about the disease of brain D. grow cell on culture medium
Answer: B. determine any hereditary disease of the embryo Amniocentesis is a process to determine any hereditary disease of the... View Article
A solid cube of side 12 cm is cut into eight cubes of equal volume. What will be the side of the new cube? Also, find the ratio between their surface areas.
Side of the solid cube = 12cm Volume of cube = 12×12×12 = 1728 cu.cm Solid cube is cut into... View Article
Hybridisation involves: A. Separation of atomic orbitals B. Overlapping of atomic orbitals C. Mixing of atomic orbitals of atom D. All of these
Answer: C. Mixing of atomic orbitals of atom Hybridisation involves mixing of atomic orbitals of atom.
The process of reduction involves: A. Removal of hydrogen B. Gain of electrons C. Addition of oxygen D. Loss of electron
Answer: B. Gain of electron The process of reduction involves gain of electrons.
Connecting link between annelida and mollusca is: (a) peripatus (b) neopilina (c) proterospongia (d) archaeopteryx
Answer: (b) neopilina Connecting link between annelida and mollusca is neopilina.
