Question Discussion & Solution

• Becquerel is the SI unit of radioactivity.
• 1 Becquerel = 1 disintegration/Second
  • Disintegration: As the radioactive elements are unstable they will disintegrate at any moment by emitting alpha or beta particles and form new elements called daughter elements which are completely different in both physical and chemical properties when compared to the elements they came from.
  • The rate of disintegration does not depend upon external factors like temperature, pressure, etc.

Key Points

txtFirst + Last Name:

False, the + symbol is an illegal character for control names.

The remaining all are acceptable control in visual basic.

Hence the correct answer is btnCalc, txtAge, lblDistance.

The correct answer is Sulphur Cycle

Key Points

• The sulphur reservoir is in the soil and sediments where it is locked in organic (coal, oil and peat) and inorganic deposits (pyrite rock and sulphur rock) in the form of sulphates, sulphides and organic sulphur.
• It is released by weathering of rocks, erosional runoff and decomposition of organic matter and is carried to terrestrial and aquatic ecosystems in a salt solution.
• The sulphur cycle is mostly sedimentary except two of its compounds, hydrogen sulphide (H2S) and sulphur dioxide (SO2), which add a gaseous component.
• Sulphur enters the atmosphere from several sources like volcanic eruptions, combustion of fossil fuels (coal, diesel etc.), from the surface of the ocean and gases released by decomposition.
• Atmospheric sulphur dioxide is carried back to the earth after being dissolved in rainwater as weak sulphuric acid (acid rain).
• Sulphur bound in a living organism is carried back to the soil, to the bottom of ponds and lakes and seas through excretion and decomposition of dead organic material.

Image of Sulphur Cycle

• Multiple Inheritance in C++ is one in which a class can inherit members from more than one class
• A class who inherit the property is derived class and class from whom it is inherited is base class or parent class

Example:

class X //base class

{

public:

 X() { cout << "X's constructor" ; }

};

 class Y //base class

{

public:

 Y() { cout << "Y's constructor "; }

};

 class C: public B, public A // Derived class: Multiple inheritance

{

public:

 Z() { cout << "Z's constructor" ; }

Option(2) is correct.

Argument I: Yes, banning will reduce misuse: No, definitely not, banning mobile phones is not a solution as the Mobile phone is used for several purposes, for study, for payment, and more, So the argument I is not strong.

Argument II: No, it will have only a very limited impact: Moblie phone has several benefits, Online classes, useful videos, internet banking, etc. it is the very useful and very low impact of missuse.So, argument II is strong.

Hence, the correct answer is an option(2)i.e., Argument II is strong.