CHEM BRAIN

Number of moles in an element is directly proportional to (MDCAT-2024)

10g of H₂ has same number of molecules as in (NEET-2024)

The same mole of N₂ , H₂ and O₂ are present in one 0.1cc of volume at STP, which one has greater number of molecules MDCAT2023

In a mole of water vapour at STP, the volume actually occupied or taken by the molecules (i.e., Avogadro’s No. x Volume of one molecule) is [Kerala EEE 2000]

The number of molecules of CO₂ present in 44g of CO₂ is [BCECE 2005]

How many atoms are contained in one mole of sucrose C₁₂H₂₂O₁₁ [Pb. PMT 2002]

The number of moles of sodium oxide in 620g of it is [BHU 1992]

The largest number of molecules is in [BHU 1997]

How many molecules are present in one gram of hydrogen [AIIMS 1982]

The number of electrons in a mole of hydrogen molecule is [CPMT 1987]

The numbers of moles of BaCO₃ which contain 1.5 moles of oxygen atoms is [EAMCET 1991]

The number of water molecules in 1 L of water is [EAMCET 1990]

Number of molecules in 100 ml of each of O₂ , NH₃ and CO₂ at STP are [Bihar MADT 1985]

19.7 kg of gold was recovered from a smuggler. How many atoms of gold were recovered (Au =197) [Pb. CET 1985]

One mole of calcium phosphide on reaction with excess of water gives [IIT 1999]

The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is [DCE 2000]

The volume occupied by 4.4 g of CO₂ at STP is [AFMC 1997, 2004; Pb. CET 1997, 2002]

The number of oxygen atoms in 4.4 g of CO2 is approx. [CBSE PMT 1990]

A molar solution is one that contains one mole of a solute in [IIT 1986]

Which one of the following pairs of gases contains the same number of molecules [EAMCET 1987]

The number of molecules in 4.25 g of ammonia are [Pb. CET 2000]

The number of moles of oxygen in 1 L of air containing 21% oxygen by volume, in standard conditions, is [CBSE PMT 1995; Pb. PMT 2004]

4.4 g of an unknown gas occupies 2.24L of volume at standard temperature and pressure. The gas may be [MP PMT 1995]

How many mole of helium gas occupy 22.4 L at 0^oC at 1 atm. pressure [Kurukshetra CEE 1992; CET 1992]

How many mole of CO₂  contain 16g of oxygen ? NUMS2021

How many atoms are contained in one mole of Ca(OH)₂  ETEA2010 Medical QNo.115

The number of atoms in 4.25 g of NH₃ is approximately [CBSE PMT 1999; MH CET 2003]

The number of electrons in a mole of hydrogen molecule is [CPMT 1987]

Which of following has maximum number of molecule among the following  2011Mains 

The number of atoms in 0.1 mol of gas a tri atomic gas is NEET2010

Which of following has maximum number of atoms NEET2020

The number of gram-atom in 3g of hydrogen atom is the same as the number of gram atom in 48g of  ETEA2018

A metal has total surface area of 150cm³i. It is evenly coated with silver by electrolysis. Its mass increases by 0.216g.

How many atoms of Silver are deposited per cm3 on the surface of the metal? Cambridge International AS & A level-2022

Nauman has body mass 60.0kg. He has 18% water in his body. Total number of water molecules in his body are MDCAT-2017 

Number of moles of O₂ in 10.6g of Na₂CO₃ MDCAT2017

Choose the correct option regarding number of particles associated with 1 mole of a substance  MDCAT2017 

In which case number of molecules of water are maximum? NEET-2018

3.0mole of calcium will contained ____________g of calcium  MDCAT2018

What mass of 95% pure CaCO₃ will be required to neutralize 50ml of 0.5M HCl solution according to following reaction.

CaCO₃ + 2HCl----------> CaCl₂ + CO₂ + 2H₂0 NEET-2022

Number of mole of water in 1kg of Ice are [MDCAT2019]

What Mass of NaOH is present in 0.5mole of Sodium Hydroxide MDCAT2016

In a vessel 10g of N₂ ,10g H₂, 10g O₂ are present. which one will have least no of atoms? [MdCAT2020]