Asked/Added Questions From NCERT:


Question 1. Asked on :15 February 2019:03:37:07 PM

 What is conservation of energy? with example .

-Added by khushi chauhan Science » Science

Answer:

khushi chauhan

 24 january 1950


-Answered by khushi chauhan On 15 February 2019:04:15:58 PM


Question 2. Asked on :03 February 2019:10:47:35 AM

When baking soda is mixed with lemon juice, bubbles are formed with evolution of a gas. What type of change is it ?

-Added by Nishant Verma Science » Science

Answer:

Himanshi Verma

  When baking soda is mixed with lemon juicebubbles formed because of evolution of carbon dioxide gas. This is a chemical change, because in this reaction new substances are formed. Question 5: When a candle burns, both physical and chemical changes take place.

-Answered by Himanshi Verma On 03 February 2019:04:03:50 PM


Question 3. Asked on :21 January 2019:04:35:59 PM

 Full Form Of VIBYOR

-Added by khushi chauhan Home Science » Science

Answer:

Akki chauhan

  VIBGYOR stands for Violet, Indigo, Blue, Green, Yellow, Orange, Red. VIBGYOR is a mnemonic used to remember the order of seven colors in the spectrum of white light. The white light is a mixture of different colors. The order of colors in white light arranged from shortest wavelength to longest is called VIBGYOR, the visible spectrum of light. 

-Answered by Akki chauhan On 05 February 2019:09:54:39 AM


Question 4. Asked on :21 January 2019:09:53:45 AM

 which is element most hardest in the world ?

-Added by Akki chauhan Science » Science

Answer:

Himanshi Verma

 Diamond is the hardest naturally occurring substance found on Earth. But it is not the hardest substance. Wurtzite boron nitride (synthetic) and lonsdaleite (which comes from meteorites) are both harder.


-Answered by Himanshi Verma On 21 January 2019:05:25:34 PM


 

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