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Carbon, Hydrogen, and Oxygen

The black substance in the product is Carbon formed

The ratio of hydrogen and oxygen in sugar 2:1 

The ammonium hydroxide formed by dissolving ammonia in water is an alkali.

Rate of backward reaction increases

As the time passes, rate of forward reaction decreases and rate of backward reaction increases.

Answer is Conc. H₂SO₄

Rate of forward reaction increases.

The property of base/alkali

a. iii. N₂ + 3H₂ ⇌ 2NH₃

In first reaction NH₄Cl is solid compound In second reaction number of reactants and product molecules are equal.

b. When pressure increases, rate of forward reaction increases.

In this reaction, the number of moles of the products is less than the number of moles of the reactants. So if the pressure is increased, rate of forward reaction is increased. Thereby the yield of the product will be more.

Increase the Pressure and Temperature.

Forward reaction

The dissolution of sulfur trioxide in water is an exothermic process. It may turn sulphuric acid initially formed into fine fog-like particles (smog) which will hinder further dissolution.

The catalyst increases the rate of both the forward and the backward reactions to the same extent. As a result, the system reaches equilibrium at a faster rate.

NH₃ + H₂O → NH₂OH

a. SO₃ 

b. H₂O

It disappears

NH₄Cl(S) → NH₃(g) + HCl (g)

NH₃ + HCl → NH₄Cl 

NH₄Cl is the product. The formation of 

NH₄Cl is the reason for the white smoke.

Reaction (iv) 

2SO₃ (g) + O₃ (g) ⇌ 2SO₃ (g) 

b. In this reaction, the number of moles of the products is less than the number of moles of the reactants. So if the pressure is increased, rate of forward reaction is increased. Thereby the yield of the product will be more.

White smoke is formed.

(a) Sodium carbonate : Na₂CO₃

(b) Uses of Sodium carbonate are :

• Manufacture of glass

• Manufacture of soaps and detergents. (Any one)

(c) Carbon dioxide/CO₂

(d) Increased concentration of carbon dioxide in atmosphere leads to global warming.

(B) Oxidases

Zn²⁺  is diamagnetic .

Correct option: c) 14/3 km/hr

Explanation:

Let speed upstream be x km ph. Speed downstream = 3x km ph. 

Speed in still water= 1/2*(3x+x)=2x km ph 2x=28/3 therefore x=14/3 km ph, speed downstream =14 km ph

Speed of the current= i/2*(14-14/3) =14/3 km ph

Correct option: d) 3.6 km

Explanation:

Speed downstream = (15+3)kmph= 18 kmph distance travelled=18*12/60 =3.6 km

Correct option: b) 3:1

Explanation:

Let the man’s rate upstream be x kmph. Then his rate downstream= 2x kmph therefore (speed in still water):(speed of stream)= ((2x+x)/2):((2x-2)/2) =3x/2 : x/2 ==3:1

Answer (d) Guanine

1. Purchase of furniture from vishwantha Rs. 10000 but it is wrongly entered in purchase book. 

2. Sale of old machinery Rs. 1000 wrongly entered into sales a/c.

1. Machinery 

2. Goodwill 

3. Building 

4. Furniture

In the corporate world, a subsidiary is a company that belongs to another company, which is usually referred to as the parent company or the holding company. The parent holds a controlling interest in the subsidiary company, meaning it has or controls more than half of its stock.

Following are the two important aspects of Computerised Accounting. 

1. Data Processing 

2. Spread Sheets.

Under this system, the amount written off as depreciation should be kept aside and invested in readily saleable securities. When the life of the asset expires, the securities are sold and a new asset is purchased with the help of sale proceeds.

(i) switch 

switch is a selection statement but others are looping / iteration statements.

(a) Chronological order.

Software acquisition includes the processes typically associated with the software engineering life cycle. However, acquisition also includes processes that fund, manage, integrate, deploy and support software systems before, during, and after their software engineering life cycle.

The maturity date of Bill is 4-6-2017.

How do you treat interest on capital is debited to profit and loss account.

A 1D array is a simple data structure that stores a collection of similar type data in a contiguous block of memory while the 2D array is a type of array that stores multiple data elements of the same type in matrix or table like format with a number of rows and columns.

Third Generation(1965-1971):

• ​The development of the integrated circuit was the hallmark of the third generation of computers.
• Transistors were miniaturized and placed on Silicon chips called semiconductors.
• Instead of punched cards and printouts, users interacted with third-generation computers through keyboards and monitors and interfaced with an operating system.
•  It allowed the device to run many different applications at one time.

First Generation(1942-1955): 

• The first-generation computers used vacuum tubes for circuitry and magnetic drums for memory.
• They were often enormous and taking up the entire room.
•  First-generation computers relied on machine language.
• They were very expensive to operate and in addition to using a great deal of electricity, generated a lot of heat, which was often the cause of malfunctions.
•  The UNIVAC and ENIAC computers are examples of first-generation computing devices.

Second Generation(1955-1964):

• The computer made in the second generation was completely based upon transistors.
• Transistors replaced vacuum tubes in computers.
• It was invented at Bell Labs by Walter H. Brattain (1902-1987), John Bardeen (1908-1991), and William B. Shockley (1910-1989) in 1947.
• In the computers of the second generation, punched cards and printouts were used for inputs and outputs.
• The TX-0 was the first computer that used transistors, It was released in 1956.
• These second-generation machines were used for a wide variety of business and scientific jobs and used high-level programming and assembly languages such as FORTRAN (Formula Translator) and COBOL (Common Business Oriented Language).
• The second-generation computers had several features:
  • ​Computers made in the second generation used transistors that made them more reliable, smaller in size, faster in speed, more energy-efficient, and cheaper compared to the first generation of computers.
  • They contain magnetic storage disks and magnetic core memory.
  • They used high-level languages such as FORTRAN and COBOL and allowed communication with the help of a telephone line.
  • As compared to the first generation of computers, the data processing time reduced from milliseconds to microseconds.

Fourth Generation(1971- up to till now):

• The microprocessor brought the fourth generation of computers, as thousands of integrated circuits were built onto a single silicon chip.
• The Intel 4004 chip, developed in 1971, located all the components of the computer.
• From the central processing unit and memory to input/output controls on a single chip.
• Fourth-generation computers also saw the development of GUIs, the mouse, and handheld devices.