Doubtly
@Doubtly · Joined Feb 2021
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- Q1 Complete the sentences by choosing the right option (a) Brazil is covered mainly by …………. Highlighted are correct answer (a) Brazil is covered mainly by …………. . (i) Highlands. (ii) Plains. (iii) Mountainous region. (iv) Dissected... 2
- Q 3. Select the correct option (a) India’s southernmost point is known as : Q 3. Select the correct option (a) India’s southernmost point is known as : (1) Lakshadweep (2) Kanyakumari (3) Indira Point (4) Port Blair... 1
- c) Describe the latitudinal and longitudinal extent of India and Brazil. (i) The extent of the mainland India is 8°4’N to 37°6’N latitudes and between 68°7’E to 97°25’E longitudes. (ii) Indira Point is the souther... 1
- b) How are Brazil and India different from each other in terms of location? (i) India is located in the northern and eastern hemispheres of the Earth. It is located in the southern part of the Asian continent. ii) Th... 2
- a) What problems did Brazil and India face after independence? Q2 There were many common problems that Brazil and India faced after independence. Some of them are: management – The resources of both the cou... 1
- Q 1) Are the sentences right or wrong. ? Rewrite the wrong ones (a) Brazil is mainly located in the Southern Hemisphere. Answer: Right (b) Tropic of Capricorn passes through the middle of India. Answer: W... 1
- Crystals can be classified into _______ basic crystal units. (A) 3 (B) 7 (C) 14 (D) 4 B) 7 is the correct option Crystals can be classified into 7 basic crystal units. 1
- Which of the following is a crystalline solid? (A) Glass (B) Rubber (C) Plastic (D) Sugar Correct option is D Sugar Sugar is a crystalline solid while glass, rubber and plastic are amorphous solids. 1
- Amorphous solids are _______. (A) true solid substances (B) substances with ordered (c)super cooled liquids is correct option : Amorphous solids are super cooled liquids 1
- Amorphous substances have _______. (i) definite heat of fusion (ii) only short range Answer: (D) (ii) and (iv) are correct In an amorphous solid (glass, rubber, plastics) the particles are arranged in a regular way only over... 1
- Amorphous solids _______. (A) possess sharp melting points (C) is the correct option Amorphous solids do not undergo clean cleavage when cut with knife 1
- A solid having irregular shape is called _______ solid (A) amorphous is correct answer: A solid having irregular shape is called amorphous solid 1
- The ability of crystalline solids to change values of physical properties when measured in different directions is called _______. C) Anisotropy is correct answer : The ability of crystalline solids to change values of physical properties when measured in different direc... 1
- Graphite, diamond and fullerene are the polymorphic forms of _______. B) Carbon is the correct option 2
- Which among the following solids is NOT soft? Copper among the following solids is NOT soft 2
- A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it? Measured length of rod = 3.50 cm That means least count of the measuring instrument should be 0.01 cm = 0.1 mm For vernier scale 1 main scal... 1
- Let E0 denote the dimensional formula of the permittivity of vacuum. If M = mass, L = length, T = time and A = electric current, then: Correct option is B From Coulomb's law we know, F = 1 over 4π in ₀q₁q₂ over r² therefore in ₀ = 1 over 4π q₁q₂ over Fr² Hence, [ in ₀ ] = [... 1
- Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage Correct option is A) 6% We know R = V over I thereforeΔ R over R = Δ V over V + Δ I over I Percentage error in R = Δ R over R × 100 = Δ V ov... 1