1. Hydrochloric acid + Potassium Hydroxide→ Potassium Chloride + Water       i.e. HCl(aq) + KOH (aq) → KCl (aq) + H2O (l)  2. NaOH + HCl = NaCl + .....

Given, Number of tourists who visited Nepal n(U) = 2000 Number of tourists who visited neither Pokhara nor Janakpur n( P∪J )' = 250 Number of tourists who visited Pokhara n( P ) = 1125 Number of tourists who visited Janakpur n( J ) = .....

Number of students who play football n( F ) = 300 Number of students who play volleyball n( V ) = 250 Number of students who play both football and volleyball n( F∩V ) = 110 Since, every student play either volleyball or football or both, n( .....

1. 2K2 + O2 = 2K2O 2.  2Hg + O2= 2HgO 3. Na + Cl2 = NaCl2 4. 2AgBr = 2Ag + Br2 5. KClO3 = KClO2 + O2 6. Fe + CUSo4 = FeSo4 + .....

Given ; Mass = 35 kg K.E = 700 J v = ? K.E = (1/2)mv2 700 = (1/2) × 35 × v2 v2 = 150/6 v = √40 v = 6.3 m/s ____________________ Hence the man should run with a velocity of 6.3 .....

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The landforms shown in the picture above are: i)    Valley ii)   Plain iii)  Island iv)  Mountain v)  .....

In your book, you might have studied that Nepal is a multi-lingual nation. Definitely, Nepal is a multi-lingual nation. People in Nepal speak 123 languages. If then, how do you define a multi-lingual nation in your own words? Give a .....

A person standing still for a long time feels tired because the force of gravity acts on our body and puts stress on our muscles. so our muscles need energy to do work and keep body balanced and help to stand upright. Also other metabolic reactions .....

The mass, in grams, of 1 mole of a molecular compound is called the gram-molecular weight. It is numericaly equal to the molecular weight. One mole is defined as the amount of substance containing as many .....

A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge are the same for both the reactants and the .....

At the beginning, temperature of earth was too high  Water was not in liquid form but is vapor form. Due to these reasons life could not exist on earth at the beginning. But later on, earth cooled and water liquified and gradually suitable .....

It's to bring the mercury in it down to the bottom of the thermometer so you can get an accurate reading. If it's already filling the thermometer, it won't respond to show the actual .....

We cannot use a clinical thermometer to measure the temperature of boiling water because the range in a clinical thermometer varies only between 35 degree celsius to 42 degree celsius .....

It is a thermometer used to measure temperature of human body. We know we can  not measure body temperature using ordinary thermometer . Clinical thermometer is specially designed thermometer to measure body .....

We know freezing point of mercury is - 38oC. So we can't measure temperature below this temperature using mercury thermometer. So, mercury thermometer is not useful in very low .....

A) Z needs maximum heat because its specific heat capacity is maximum and more heat is required to heat object with more specific heat capacity. B) x will have more temperature because it has less specific heat capacity. C ) It means that 4200 .....

Here, Q = 60 KJ = 60000 J m = 1.5 kg dt = 20 o C now , use S = Q / m . .....

Here  mass = 1.5 kg S = 400 J / Kg o C dt = t - 300 now use  Q = ms .....

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Freezing Point Boiling Point 1. Freezing point is the fixed temperature at which a liquid changes into its solid state upon cooling. 1. Boiling point is the fixed temperature at which a solid changes into its liquid .....

The simple answer is that ice is less dense than water, so ice .....

Air pressure is the weight of air molecules pressing down on the Earth. The pressure of the airmolecules changes as you move upward from sea level into the .....

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Let the marks on computer be x . Then total marks obtained = 90 + 92 + 98 + 75 + 82 + x Total number of subjects = 6 Now use, average  marks = total marks / number of .....

For 60 men, it lasts for 90 days. For 1 man it lasts for 90 x 60 days For 45 men , it lasts for 90 x 60 / 45 = 120 .....

see this figure short wave from sunlight can enter into greenhouse easily. but reflected longer wavelengths can not pass through it. so heat is trapped inside green house. this makes temperature warmer inside greenhouse. and it is possible to .....