The Royal Botanical Garden is situated in
(a) Paris(b) New Delhi(c) Kew(d) WashingtonCorrect option: (c) KewThe Royal Botanical Garden is situated in Kew.
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The value of k for which the system of equations x + 2y – 3 = 0 and 5x + ky + 7 = 0 has no solution, is
(a) 10(b) 6(c) 3(d) 1Correct option: (a) 10Explanation:Given,x + 2y – 3 = 05x + ky + 7 = 0Comparing... View Article
What is the perimeter of a square with side 6 cm?
Given, Side of a square = a = 6 cm We know that, the perimeter of a square = 4a... View Article
Explain how a chain of markets is formed. What purpose does it serve?
Goods are first produced in factories, farms and homes (depending on the type of business). However, it does not mean... View Article
Fill in the blank: The plural form of the noun scarf is ____________.
(a) Scarves(b) Scarfes(c) Scarfs(d) ScarveCorrect option: (a) ScarvesThe plural form of the noun scarf is Scarves.
In diborane the two H-B-H angles are nearly
(a) 60°, 120° (b) 95°, 120° (c) 95°, 150° (d) 120°, 180°Correct option: (b) 95°, 120°In diborane the two H-B-H... View Article
What is petroleum? Where does petroleum occur?
Petroleum is a crude oil. It forms under the seas and oceans after millions of years due to the decomposition... View Article
Write chemical name and chemical formula of green vitriol.
The chemical name of green vitriol is ferrous sulfate and it is denoted by a chemical formula FeSO4.
Define molecular mass of a substance.
The molecular mass of a substance is the relative mass of its molecule as compared to the mass of the... View Article
State the function of chlorenchyma.
The chlorenchyma are parenchymal cells that comprise chloroplasts. The chlorenchyma hence serves as the cell that promotes photosynthesis. In the... View Article
What is the SI unit of electrical energy consumed? Define it.
The unit of electrical energy consumed is kWh. One kilowatt-hour is the electrical energy consumed by an electrical appliance of... View Article
Dimensions of kinetic energy are the same as that of
<p> Dimensions of kinetic energy are the same as that of : (a) Acceleration (b) Force (c) Work (d) Pressure</p>... View Article
What is the value of cot (-315)?
The value of cot (-315) is 1.
Explain the working of photo emissive cell. Write any two applications of photoelectric cells.
A photoemissive cell, generally known as a phototube, uses the principles of the photoelectric effect, the phenomenon whereby light-sensitive surfaces... View Article
Due to frenkel defect the density of ionic solids
Due to Frenkel defect the density of ionic solid (a) increases (b) decreases (c) does not change (d) invariably increases... View Article
Mass of a body decreases slightly when it is negatively charged
Mass of the body decreases slightly when it is negatively charged because when a body attains a negative charge, it... View Article
Molecular masses KNO3, H2O2
The molecular mass of KNO3 is 101.1032 g/mol. The molecular mass of NO3 is 62.0049 g/mol.
The ideal level of liquid ratio is
The ideal level of liquid ratio is 1:1.
The simplest form of 1.5 : 2.5 is
The simplest form of 1.5 : 2.5 is 3 : 5. \(\begin{array}{l}\frac{1.5}{2.5}=\frac{15\times 10}{25\times 10}=\frac{3}{5}=3:5\end{array} \)
In which case change in entropy is negative?
In which case change in entropy is negative? Expansion of gas at a constant temperature Evaporation of water Sublimation of... View Article
