Question: The percentage of copper and oxygen in samples of CuO obtained by different methods were found to be the same. This illustrates the law of [AMU 1982, 92]
(a) Constant proportions
(b) Conservation of mass
(c) Multiple proportions
(d) Reciprocal proportions
Correct Answer: (a) Constant proportions
![Question: The percentage of copper and oxygen in samples of CuO obtained by different methods were found to be the same. This illustrates the law of [AMU 1982, 92] (a) Constant proportions (b) Conservation of mass (c) Multiple proportions (d) Reciprocal proportions](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGZEWEykk3koHcr4dvuKnEUgRX5cFMqni_AAYC-xpZ5A-UKAAvGTBvG3SglQpbtAJH4yBJLYbugoNOH54CzDPzmWvBz15oOKpUSbhc92QTkxpZ9pBajyB7jTCHWW2uWOmItN8ExdC9sD7_mJa-58Z2OuE91nbInQp8wndEwAZRS3dSESUjK77qGFVc/s1920/The%20percentage%20of%20copper%20and%20oxygen%20in%20samples%20of%20CuO%20obtained%20by%20different%20methods%20were%20found%20to%20be%20the%20same.%20This%20illustrates%20the%20law%20of%20%5BAMU%201982,%2092%5D.jpg "Question: The percentage of copper and oxygen in samples of CuO obtained by different methods were found to be the same. This illustrates the law of [AMU 1982, 92] (a) Constant proportions (b) Conservation of mass (c) Multiple proportions (d) Reciprocal proportions")
More Question
- The element whose a atom has mass of 10.86 x 10^-26 kg is
- A 400 mg iron capsule contains 100 mg of ferrous fumarate, (CHCOO)₂Fe. The percentage of iron pasent in it is approximately
- Caffeine has a molecular weight of 194. If it contains 28.9% by mass of nitrogen, number of atoms of nitrogen in one molecule of caffeine is
- If the density of water is 1 g cm³ then the volume occupied by one molecule of water is approximately [Pb. PMT 2004]
- What volume of NH₃ gas at STP would be needed to prepare 100ml of 2.5 molal (2.5m) ammonium hydroxide solution
- What is the weight of oxygen required for the complete combustion of 2.8 kg of ethylene [CBSE PMT 1989]
- The weight of a molecule of the compound C₆₀H₁₂₂ is [AIIMS 2000]
- The specific heat of a metal is 0.16 its approximate atomic weight would be
- The number of molecule at NTP in 1 ml of an ideal gas will be
- What should be the equivalent weight of phosphorous acid, if P=31; O=16; H=1
- If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will [AIEEE 2005]
- Ratio of Câ‚š and Cáµ¥ of a gas X is 1.4, the number of atom of the gas ‘X’ present in 11.2 litres of it at NTP will be [CBSE 1999]
- How much coulomb charge is present on 1g ion of N^-3
- 1.520 g of the hydroxide of a metal on ignition gave 0.995 gm of oxide. The equivalent weight of metal is [DPMT 1984]
- Rearrange the following (I to IV) in the order of increasing masses and choose the correct answer from (a), (b), (c) and (d) (Atomic mass: N=14, O=16, Cu=63)