Find the area of the triangle having three sides given as 5 cm, 6 cm and 7 cm.
Given, the sides of triangle are 5cm, 6cm and 7cm. By Heron’s formula we can find the area of triangle.... View Article
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In a natural ecosystem, decomposers include A) Microscopic animals B) Bacteria and fungi C) The above two types of organisms plus microscopic animals D) None of the above
Answer: B) Bacteria and fungi In a natural ecosystem, decomposers include only bacteria and fungi.
Silicon doped with electronrich impurity forms ____. A. p-type semiconductor B. n-type semiconductor C. intrinsic semiconductor D. insulator
Answer: B. n-type semiconductor Silicon doped with electronrich impurity forms n-type semiconductor.
Vegetative propagation in Pistia ,Water Hyacinth occurs by A. Sucker B. Runner C. Offset D. Stolon
Answer: C. Offset
Lenz’s law is a consequence of the law of conservation of ? A) Charge B) Mass C) Energy D) Momentum
Answer: C) Energy
Chambal river is a part of: A) Sabarmati basin B) Ganga basin C) Narmada basin D) Godavari basin
Answer: C) Narmada basin
In electrovalency: (A) molecules lose electrons, forming atoms (B) molecules gain electrons, forming atoms (C) atoms share electrons (D) atoms lose or gain electrons, forming ions
Answer: (D) atoms lose or gain electrons, forming ions
AUG codes for (a) Valine (b) Histidine (c) Phenylalanine (d) Methionine
Answer: d. Methionine AUG is the START codon and it codes for the amino acid methionine (Met) in eukaryotes and... View Article
Draw all the possible resonance structures for phenol.
The resonance structures for phenol C6H5OH is:
The mth term of ap is n and its nth term is m, then write its pth term.
As per the given condition: am = a + (m−1) d = n ..(i) an = a + (n−1) d = m ... View Article
Boiling/melting points of the following hydrides follow in order.
A. SbH3>AsH3>PH3AsH3>PH3>NH3
C. SbH3>AsH3
Answer: A. SbH3>AsH3>PH3
Close type of vascular bundle lacks? (a)Xylem (b)Sclerenchyma (c)Phloem (d)Cambium
(d)Cambium In closed type of vascular bundle cambium is absent between xylem and phloem.
The reaction between carbon and oxygen can be represented as: C(g)+O2(g)→CO2(g)+heat In which of the following type(s), the above reaction can be classified? I. Combustion reaction II. Displacement reaction III. Endothermic reaction IV. Combination reaction A. (I) and (III) B. (I), (III) and (IV) C. (I) and (IV) D. (I) only
Answer: C. (I) and (IV) The given reaction is both combustion and combination reaction.
By adding gypsum to cement: A. reduce setting time to cement B. produce very light colour cement C. increases setting time of cement D. shining surface is formed
Answer: C. increases setting time of cement If gypsum is not added to the cement, the cement will set immediately,... View Article
How does democracy allow us to correct its own mistakes?
Democracy makes space for public discussion on these mistakes. There is also room for correction. Rulers have to change their... View Article
Silver articles become black on prolonged exposure to air. This isdue to the formation of: A. Ag3N B. Ag3O C. Ag2S D. Ag2S and Ag3N
C. Ag2S Silver article become black when exposed to air, because of presence of H2S gas present in air. Thus,... View Article
Name the following: Biotic constituents of soil
Microorganism are the biotic constituents of soil
The first clear expression of nationalism came with the French Revolution in?
The first clear expression of nationalism came with the French Revolution in 1789.
What is the relation between c p and c v?
The relation between CP and CV for an Ideal Gas is: CP – CV = R where R is gas constant.
Explain addition polymers with an example.
The addition polymerization occurs by the repeated addition of monomer molecules that possess triple or double bonds. For example, the... View Article
