Consider : eSIM

which is correct ?

1. Embedded in the motherboard of the mobile phone.

2. It is reprogrammable

3. They are environment friendly

4. They pose threat to data privacy Data privacy

Our white blood cells create hypochlorous acid from sodium chloride in the bloodstream to fight off any invasive bacteria.

Consider the following statements regarding the purification of water;

[JKPSC Pre 2022] #science

1. Chlorine kills pathogenic bacteria but it does not affect spores and hepatitis and jaundice viruses.

2. Ozone removes all chlorine and inactivates viruses very quickly.

Both statements are TRUE

In normal situations, dosage of chlorine in water is such a way that residual chlorine of 0.2 mg/l is left. However, in case of ebidemic, chlorination is done in such a way at residual chlorine of     
1 to 2 mg/l is left in water before sending in water in distribution network. This process is called super chlorination and it is done so that bacteria produced at later stages can be easily killed by residual chlorine in water.


Super-chlorination is most commonly used when water has very high bacteria content and generally comes from river sources or where some form of heavy pollution or epidemic has occurred. The general dosage of super chlorination is in the range of 5 to 50 mg/l


However, the spore forming bacteria cannot be killed by chlorination. It can be done by a process called STERILIZATION which destroys spores and bacteria. Both it is done at high temperature and under high-pressure.

Which one of the following statements is not correct?

A. Hepatitis B virus is transmitted much like HIV.

B. Hepatitis B, unlike Hepatitis C, does not have a vaccine.

C. Globally, the number of people infected with Hepatitis B and C viruses arc several times more than those infected with HIV.

D. Some of those infected with Hepatitis B and C viruses do not show the symptoms for many years.

(CSE 2019)

#70th. BPSC