No products in the cart.

Why are K and Cs rather …

CBSE, JEE, NEET, CUET

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

Why are K and Cs rather than Li used in photoelectric cells

Posted by Kriti Saxena 6 years ago

CBSE > Class 11 > Chemistry

1 answers

Mehak Gautam 6 years ago

As we know, metals have high tendency to lose electrons.(lower the ionisation energy, higher is the tendency to lose electrons) that's why metals are used in photoelectric cells. Potassium and Caesium have much lower Ionisation enthalpy than that of Lithium . Therefore ,these metals on exposure to light emits electrons easily but lithium doesn't. As a result, K and Cs rather than Li are used in photoelectric cells.

ANSWER

http://mycbseguide.com/examin8/

Related Questions

A mixture of 24~dm^{3} of hydrogen and 100~dm^{3} of oxygen was ignited and the reaction mixture was cooled to room temperature and pressure. What will be volume of gases remaining of the end of the reaction?

Posted by Deepak Mamgaei 1 year, 3 months ago

CBSE > Class 11 > Chemistry

0 answers

An organic compound contain 16.27 carbon, 0.677 hydrogen and 72.2% chlorine and it's MM is 147.5 amu. Find it's molecular formula

Posted by Anshi Shrivastava 1 year, 3 months ago

CBSE > Class 11 > Chemistry

0 answers

The uncertainty in position and velocity 10-¹⁰ and 5.27×10-²⁴m/srespectively calculate the mass of the particle.

Posted by Shikha Yadav 1 year, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

25 chemical compounds with chemical formula

Posted by Rihan Mehta 1 year, 3 months ago

CBSE > Class 11 > Chemistry

0 answers

Calculate the concentration of nitric acid in moles per litre in a sample which has a density 1.41gml-1. And the mass percent of nitric acid in it being 69%

Posted by Haleema Sadiya 1 year, 2 months ago

CBSE > Class 11 > Chemistry

0 answers

74 g of calcium hydroxide Ca(OH)2 in 1 liter

Posted by Shaila Bombe 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

How to calculate na2so4 mass percent with step by step

Posted by "Serai✨ Wallance" 1 year, 3 months ago

CBSE > Class 11 > Chemistry

0 answers

What are all the formulas used in chapter basic concepts of chemistry

Posted by Parneet Kaur 10 months, 3 weeks ago

CBSE > Class 11 > Chemistry

0 answers

What is the no. Of moles find in 90 g of H20

Posted by Naman Mehra 1 year, 3 months ago

CBSE > Class 11 > Chemistry

0 answers

Calculate the number of atoms of each type in 3.4 to ML of nitrogen gas at standard temperature and pressure??

Posted by Arju Jaat 1 year, 3 months ago

CBSE > Class 11 > Chemistry

0 answers

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

Test Generator

Test Generator

Create papers online. It's FREE.

CUET Mock Tests

CUET Mock Tests

75,000+ questions to practice only on myCBSEguide app

Google Play

Download myCBSEguide App